Publications by authors named "Nguyen Minh Duc"

110 Publications

Cecum perforation due to a fish bone.

Oxf Med Case Reports 2021 May 24;2021(5):omab025. Epub 2021 May 24.

Department of Radiology, Hanoi Medical University, Ha Noi, Vietnam.

Foreign body (FB) ingestion is a common condition encountered in clinical practice, especially among the pediatric age group; however, this occurrence is rare among adults. Some FBs can induce the perforation of the gastrointestinal tract, including fish bones, chicken bones and toothpicks. The ingestion of FBs is rarely associated with bowel perforation, and most FBs are passed spontaneously. The ingestion of sharp and pointed objects typically produces adverse events related to the upper gastrointestinal system, and FBs are rarely retained in the colon. Bowel perforation caused by the ingestion of FBs should be diagnosed and treated in a timely manner. Here, we present the unusual case of a 51-year-old male who presented to the emergency room with complaints of acute abdominal pain secondary to fish bone ingestion, which triggered cecum perforation.
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http://dx.doi.org/10.1093/omcr/omab025DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8143667PMC
May 2021

Differentiation Between Surgical and Nonsurgical Intussusception: A Diagnostic Model Using Multi-Detector Computed Tomography.

Acta Inform Med 2021 Mar;29(1):32-37

Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam.

Background: The differentiation of surgical from nonsurgical adult intussusception may enable the appropriate selection of management strategies.

Objective: This study aimed to investigate the diagnostic potential of multidetector computed tomography (MCDT) features to differentiate surgical from nonsurgical adult intussusception and develop a diagnostic model.

Methods: A retrospective study was performed on 96 patients with intussusceptions at the University Medical Center Hospital between January 2014 and January 2020. Two radiologists reviewed all images, and intussusception characteristics were documented. The location of intussusception, length, diameter, interposed fat thickness, lead point, and complications were evaluated. Based on the results, a diagnostic tree model was developed to differentiate between surgical and nonsurgical adult intussusception.

Results: A total of 99 intussusceptions in 96 patients (mean age: 53.0 ± 16.5 years), including 35 (35.3%) enteroenteric, 27 (27.3%) enterocolic, and 37 (37.4%) colocolic lesions, were evaluated. Of the enteroenteric intussusceptions, 22 (62.9%) were surgical, including 19 (79.2%) with lead points. Among colon intussusceptions, 63 (98.4%) were surgical, and 100% had lead points. The characteristics used to predict surgical intussusceptions included lead point presence, length ≥ 5.0 cm, diameter ≥ 3.2 cm, interposed fat thickness ≥ 0.5 cm, and complications (p < 0.001). Based on these features, we established a diagnostic tree model that correctly classified 96 (97%) of 99 lesions.

Conclusion: Our study reinforces the importance of MDCT for the diagnosis and guided management of adult intussusceptions. The characteristics that predicted surgical intussusceptions included lead points, length, diameter, interposed fat thickness, and complications. A systematic approach using this diagnostic tree model could be used to distinguish surgical and nonsurgical adult intussusception.
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http://dx.doi.org/10.5455/aim.2021.29.32-37DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8116087PMC
March 2021

Detecting Fetal Central Nervous System Anomalies Using Magnetic Resonance Imaging and Ultrasound.

Med Arch 2021 Feb;75(1):45-49

Department of Radiology, Hanoi Medical University, Hanoi, Vietnam.

Background: Most fetal abnormalities can be detected on ultrasound, the evaluation of fetal CNS abnormalities can be limited by various factors, including obesity, polyhydramnios, multiple pregnancies, and increased cranial ossification during the third trimester.

Objective: This study aimed to evaluate the ability to detect fetal central nervous system (CNS) anomalies using magnetic resonance imaging (iuMRI) and ultrasound (US) techniques.

Methods: This prospective study was approved by the institutional review board (Ref: 2968/QĐ-ĐHYHN dated 11 July 2019), and the requirement to obtain the informed consent of patients was waived. This study included 66 fetuses with diagnosed or suspected CNS abnormalities based on the results of a prenatal screening US performed at the antenatal diagnosis center of the Central Obstetrics and Gynecology Hospital. All pregnant women with a suspected diagnosis of abnormal fetal CNS on US underwent 1.5-Tesla iuMRI within 14 days of the US at Hanoi Medical University Hospital between June 2019 and June 2020. Cohen's kappa coefficient (κ) was used to determine the agreement between US and iuMRI findings.

Results: A total of 66 pregnant women were examined, including 66 fetuses, for which 79 abnormalities were detected by US and 98 abnormalities were detected by iuMRI. The average gestational age was 29 weeks and 6 days. The comparison of iuMRI and US findings revealed similar diagnoses for 71 abnormalities (67%) and different diagnoses for 35 abnormalities (33%). The level of agreement between US and iuMRI was almost perfect for ventriculomegaly and cystic lesions, with κ values 0.87 and 0.84, respectively. The level of agreement between US and iuMRI was the weakest for hemorrhage, with a κ value 0 (no agreement), and cortical abnormalities, with a κ value of 0.46 (weak agreement).

Conclusion: The level of agreement between US and iuMRI diagnoses was almost perfect for the detection of ventriculomegaly and was weakest for the detection of hemorrhage and cortical abnormalities, which were abnormalities detected by iuMRI but not by ultrasound.
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http://dx.doi.org/10.5455/medarh.2021.75.45-49DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8116073PMC
February 2021

A case report of secondary bilateral orbital lymphoma in a child.

Radiol Case Rep 2021 Jul 30;16(7):1669-1671. Epub 2021 Apr 30.

Department of Radiology, Hanoi Medical University, Ha Noi, Vietnam.

Lymphoma is one of the most common cancers of the orbital and lacrimal glands, after squamous cell carcinoma and melanoma. Based on cell origin, most lymphoma cases are classified as non-Hodgkin lymphoma. Orbital lymphoma can be either primary or secondary. The clinical manifestations of lymphoma are diverse, with the most common symptoms being bilateral or unilateral proptosis, limited eye motility, swelling, pain, changes in visual acuity, and diplopia. In this article, we describe the case of a 6-year-old male who presented with bilateral rapid orbital swelling for 10 days. This patient underwent surgical biopsy, and the final diagnosis was bilateral orbital secondary non-Hodgkin lymphoma.
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http://dx.doi.org/10.1016/j.radcr.2021.03.069DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8111464PMC
July 2021

Correlations between apparent diffusion coefficient values and histopathologic factors in breast cancer.

Clin Ter 2021 May;172(3):218-224

Department of Radiology, Ha Noi Medical Uni-versity, Ha Noi, Viet Nam.

Background: Breast cancer is the most common malignancy dia-gnosed in women, and the incidence gradually increases. Magnetic resonance imaging (MRI) is become widely used to identify benign and malignant breast tumors. Objective: The aim of this study was to evaluate the relationships between apparent diffusion coefficient (ADC) values and histopathologic prognostic factors in breast cancer.

Methods: Forty-nine breast carcinoma patients were included evaluated for prognostic factors, including histological type, histo-logical grade, estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and molecular subtype. Minimum (ADCmin) and mean (ADCmean) ADC values were compared among prognostic factor groups by Mann-Whitney U test and Kruskal-Wallis test.

Results: Lower mean ADCmin and ADCmean values were observed for no special type (NST) than for invasive lobular carcinoma (ILC) type (0.81 ± 0.03 × 10-3 and 0.96 ± 0.03 × 10-3 mm2/s, P= 0.002 and 0.03, respectively). The mean ADCmin and ADCmean values for the high-level Ki-67 group were significantly lower than those for the low-level Ki-67 group (P = 0.001 and 0.008, respectively). No correlations were observed between ADC values and histological grades, ER, PR, HER2, and molecular subtypes.

Conclusion: ADCmin and ADCmean values correlated with the pro-liferation marker Ki-67 and histological grade. ADC values can serve as noninvasive indicators of cell proliferation in breast cancer.
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http://dx.doi.org/10.7417/CT.2021.2318DOI Listing
May 2021

Medulloblastoma in the cerebellopontine angle mimicking a schwannoma.

Clin Case Rep 2021 Apr 12;9(4):1948-1953. Epub 2021 Feb 12.

Department of Radiology Hanoi Medical University Ha Noi Vietnam.

The typical distinction between cerebellopontine angle (CPA) medulloblastoma and other primary CPA tumors was not fully known. While CPA medulloblastoma is very uncommon, it should be included in the differential diagnosis of patients with CPA tumors.
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http://dx.doi.org/10.1002/ccr3.3912DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8077292PMC
April 2021

Emergency embolization for breast pseudoaneurysm following vacuum-assisted biopsy: a case report.

Pan Afr Med J 2021 8;38:135. Epub 2021 Feb 8.

Department of Radiology, Ha Noi Medical University Hospital, Ha Noi, Vietnam.

Vacuum-assisted breast biopsy (VABB) is a minimally invasive procedure and has become an important treatment method. Although VABB is a minimally invasive procedure, it might cause complications, particularly those associated with blood vessels. In this article, we aimed to describe a 35-year-old female who experienced pseudoaneurysm post-VABB and was successfully treated with embolization. She presented to the hospital with a suspected left breast tumor. The pathology report after biopsy confirmed fibroadenoma, and the patient underwent VABB to remove the tumor. One hour after VABB, the patient described pain and swelling at the location of the removed tumor. Breast ultrasound revealed a hematoma and pseudoaneurysm. The bleeding did not stop following the application of manual compression. Breast hemorrhage was controlled by endovascular embolization. Pseudoaneurysm is an uncommon complication of VABB, and embolization represents an effective method for the management of breast pseudoaneurysm.
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http://dx.doi.org/10.11604/pamj.2021.38.135.27619DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8052620PMC
May 2021

Hypovascular pancreatic neuroendocrine tumor with hepatic metastases: A case report and literature review.

Radiol Case Rep 2021 Jun 10;16(6):1424-1427. Epub 2021 Apr 10.

Department of Radiology, Ha Noi Medical University, Ha Noi, Vietnam.

Hypovascular pancreatic neuroendocrine tumors are uncommon pancreatic tumors and commonly misdiagnosed as pancreatic ductal adenocarcinoma or chronic mass-forming pancreatitis. The liver is the organ most commonly affected by neuroendocrine tumor metastases but hepatic neuroendocrine tumor metastases are quite difficult to discriminate from other hepatic metastases and primary hepatic tumors. We describe a case of a 47-year-old man with incidentally detected multiple hepatic lesions on ultrasound. On further imaging technique including computed tomography and magnetic resonance imaging, the patient had an abnormal hypoenhancing lesion at the pancreatic tail and multiple hyperenhancing hepatic metastases that were diagnosed as hypovascular pancreatic well-differentiated neuroendocrine tumor Grade 2 with multiple hypervascular hepatic metastases after liver biopsy and surgery. Neuroendocrine tumor is a rare etiology among hypoenhancing pancreatic tumors, and must be considered to discriminate from pancreatic adenocarcinomas in cases there are multiple hyperenhancing hepatic metastases on the arterial phase without typical washout on the portal venous phase.
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http://dx.doi.org/10.1016/j.radcr.2021.03.024DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8063702PMC
June 2021

A rare case of lipomatous pseudohypertrophy of the pancreas.

Radiol Case Rep 2021 Jun 9;16(6):1363-1367. Epub 2021 Apr 9.

Department of Radiology, Bach Mai Hospital, Ha Noi, Viet Nam.

Lipomatous pseudohypertrophy of the pancreas is a rare disease with unknown etiology, and the pancreas parenchyma is replaced by pancreatic parenchyma by fat tissue. In this article, we aimed to report the case of a 26-year-old male patient admitted to hospital with loss of appetite for 6 months. Abdominal computed tomography (CT) and magnetic resonance imaging (MRI) scans showed diffuse enlargement and fatty replacement over the whole pancreas, with scattered remnants of pancreatic parenchyma. Histologic results defined lipomatous pseudohypertrophy of the pancreas. To summarize, this case report is to put forward this extremely rare presentation and to sensitize clinicians that this entity can be a cause of exocrine pancreatic insufficiency, which requires patient follow-up for the appropriate treatment.
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http://dx.doi.org/10.1016/j.radcr.2021.03.045DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8055528PMC
June 2021

A rare case of inflammatory myofibroblastic tumor of the vulva in a newborn.

Radiol Case Rep 2021 Jun 9;16(6):1352-1354. Epub 2021 Apr 9.

Department of Radiology, Ha Noi Medical University, Ha Noi, Vietnam.

Inflammatory myofibroblastic tumor (IMT) is an uncommon neoplasm that rarely arises in the genitourinary system. IMTs in the vulva in infants are extremely rare in the literature. The tumor consists of myofibroblastic spindle cells accompanied by inflammatory cell infiltration. In this article, we aimed to describe the case of IMT in the vulva. A newborn girl presented with a mass in the vulva detected in the prenatal period. The patient was treated with surgery and chemotherapy. Follow-up 8 months after surgery showed no signs of recurrence. In conclusion, IMT has a variable clinical presentation, surgery is the optimal approach, but in cases without complete resection, chemotherapy is essential.
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http://dx.doi.org/10.1016/j.radcr.2021.03.020DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8055520PMC
June 2021

Non-functioning adrenocortical carcinoma.

Radiol Case Rep 2021 Jun 3;16(6):1329-1334. Epub 2021 Apr 3.

Department of Radiology, Hanoi Medical University, Hanoi, Vietnam.

Adrenocortical carcinoma (ACC) is a rare malignancy that arises from the adrenal cortex and can be classified as either non-functioning or functioning. A patient with non-functioning ACC may present no specific symptoms. Imaging analysis can provide some information to a clinician who suspects ACC, such as tumor size, density, washout, necrosis, hemorrhage, and calcification. Histopathology is used to confirm and determine the origin of the malignancy and can provide relevant prognostic information. Microscopic findings can be used to obtain information such as the Weiss score, resection surface features, Ki-67 proliferative index, and the degree of capsular and vascular invasion. Surgery can be curative for localized tumors, and adjuvant therapy using mitotane and cytotoxic chemotherapy is often employed for advanced-stage tumors. We describe a case report of a 32-year-old man with a non-functioning ACC that highlights the importance of radiological and pathological features in the diagnosis of ACC and their use as prognostic factors.
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http://dx.doi.org/10.1016/j.radcr.2021.03.006DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8049877PMC
June 2021

The performance of diffusion tensor imaging parameters for the distinction between medulloblastoma and pilocytic astrocytoma.

Authors:
Nguyen Minh Duc

Minerva Pediatr (Torino) 2021 Apr 2. Epub 2021 Apr 2.

Doctoral Program, Department of Radiology, Hanoi Medical University, Ha Noi, Vietnam -

Background: To evaluate the performance of diffusion tensor imaging (DTI) parameters for the distinction between pediatric medulloblastomas and pilocytic astrocytomas.

Methods: DTI was performed in 36 patients, who were divided into two groups: group 1 consisted of 26 patients with medulloblastoma, whereas group 2 consisted of 10 patients with pilocytic astrocytoma. The Mann-Whitney U test was utilized to compare the tumoral fractional anisotropy (tFA) and diffusivity (tMD) values and the tumor to parenchyma ratios for these values (rFA and rMD, respectively) between these two groups. Receiver operating characteristic (ROC) curve analysis and the Youden index were applied to compute the cut-off point, and then the area under the curve (AUC), sensitivity, and specificity were calculated.

Results: The tFA and rFA values of group 1 were significantly lower than those of group 2 (p < 0.05). In contrast, the tMD and rMD values of group 1 were significantly higher than those of group 2 (p < 0.05). Among the FA parameters, a cut-off tFA value of 0.37 provided the best ability to discriminate between medulloblastomas and pilocytic astrocytomas, producing a sensitivity value of 84.6%, a specificity of 80%, and an AUC of 81.7%. The cut-off values for MD and rMD were determined to be 1.06 × 10-3 mm2/s and 1.33, respectively, and were determined to be the most efficacious parameters for the differential diagnosis between medulloblastoma and pilocytic astrocytoma, which generated sensitivity, specificity, and AUC values of 100%.

Conclusions: DTI parameters can play pivotal roles in the discrimination between medulloblastoma and pilocytic astrocytoma.
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http://dx.doi.org/10.23736/S2724-5276.21.05955-7DOI Listing
April 2021

IgG4-Related Sclerosing Cholangitis Mimicking Cholangiocarcinoma.

Case Rep Oncol 2021 Jan-Apr;14(1):39-46. Epub 2021 Feb 18.

Department of Radiology, Ha Noi Medical University, Hanoi, Vietnam.

IgG4-related sclerosing cholangitis (IgG4-SC) is a relatively newly identified disease that is frequently associated with autoimmune pancreatitis. The differential diagnosis between cholangiocarcinoma, primary sclerosing cholangitis, and IgG4-SC can be challenging due to significant overlap among the clinical and imaging characteristics. We report the case of a 71-year-old woman who was diagnosed with IgG4-related disease based on increased serum IgG4 levels, imaging, and clinical presentation, which showed systemic involvement, including sclerosing cholangitis and kidneys. The patient presented with chronic jaundice. Magnetic resonance imaging revealed bile duct strictures and the dilatation of upstream bile ducts, smooth wall thickening with uniform enhancement in the delayed phase, and no vascular infiltration. Multiple low-density, wedge-shaped areas were identified in both kidneys, which were hypointense on T2-weighted images and hyperintense on diffusion-weighted images. The serum IgG4 levels of this patient were elevated to nearly 10-fold the normal upper limit. A diagnosis of IgG4-SC associated with IgG4-related kidney was made. Based on this case, pre-surgery IgG4 serum treatment in patients with non-malignant bile duct stenosis was recommended to exclude IgG4-SC.
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http://dx.doi.org/10.1159/000513029DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7983604PMC
February 2021

Ectopic thymoma in the middle mediastinum: A case report and literature review.

Clin Ter 2021 Mar;172(2):94-98

Department of Radiology, Children's Hospital 02, Ho Chi Minh City, Vietnam.

Abstract: Thymomas are typically located in the anterior mediastinum and are rarely identified in other locations. A 48-year-old male patient was admitted to the hospital due to myasthenia gravis (MG). A mass in the middle mediastinum, obstructing the superior vena cava, was revealed by computed tomography and magnetic resonance imaging examination. The postoperative diagnosis was thymoma type AB, stage III. After surgery, he was treated with radiation therapy neoadjuvant. At the 5-year follow-up, recurrence was not observed. Ectopic thymoma in the middle mediastinum has been reported in 26 other cases in the literature. Most were classified as thymoma type A or AB, and all were stage I or II. Most of them were located in the upper right mediastinum, adjacent to the right trachea, and in the retro innominate vein area. Thymoma should be considered a differential diagnosis when a mass is observed in the middle mediastinum.
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http://dx.doi.org/10.7417/CT.2021.2291DOI Listing
March 2021

Intra-fourth-ventricular choroid plexus papilloma miming ependymoma.

Clin Ter 2021 Mar;172(2):99-103

Department of Radiology, Hanoi Medical University, Ha Noi, Vietnam.

Abstract: Choroid plexus papilloma (CPP), a low incidence central nervous system (CNS) tumor, typically develops as an intraventricular neoplasm arising from the epithelium of the choroid plexus. Infratentorial CPP is predominantly clustered in adults with roughly 70% in the fourth ventricle, while supratentorial CPP commonly found in the lateral ventricles, is the most frequent location in children. The clinical and imaging features of CPP are not typical and may induce the misdiagnosis as other types of primary brain tumors. In this paper, we described a fourth-ventricular CPP that was misdiagnosed as ependymoma despite the manipulation of groundbreaking magnetic resonance imaging (MRI) sequences. These findings indicated that CPP should be considered when performing the differential diagnosis of intraventricular neoplasms.
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http://dx.doi.org/10.7417/CT.2021.2292DOI Listing
March 2021

Three-Dimensional Pseudo-Continuous Arterial Spin Labeling Parameters Distinguish Pediatric Medulloblastoma and Pilocytic Astrocytoma.

Authors:
Nguyen Minh Duc

Front Pediatr 2020 2;8:598190. Epub 2021 Mar 2.

Doctoral Program, Department of Radiology, Hanoi Medical University, Ha Noi, Vietnam.

Arterial Spin Labeling (ASL), a perfusion assessment without using gadolinium-based contrast agents, is outstandingly advantageous for pediatric patients. The differentiation of medulloblastomas from pilocytic astrocytomas in children plays a significant role in determining treatment strategies and prognosis. This study aimed to assess the use of ASL parameters during the differentiation between pediatric medulloblastoma and pilocytic astrocytoma. The institutional review board of Children's Hospital 2 approved this prospective study. The brain magnetic resonance imaging (MRI) protocol, including axial three-dimensional (3D) pseudo-continuous ASL, was evaluated in 33 patients, who were divided into a medulloblastoma group ( = 25) and a pilocytic astrocytoma group ( = 8). The quantified region of interest (ROI) values for the tumors and the tumor to parenchyma ratios were collected and compared between the two groups. Receiver operating characteristic (ROC) curve analysis and the Youden index were utilized to identify the best cut-off, sensitivity, specificity, and area under the curve (AUC) values for significant ASL parameters. The cerebral blood flow (CBF) and the ratio between the CBF of the tumor relative to that of the parenchyma (rCBF) values for medulloblastomas were significantly higher than those for pilocytic astrocytomas ( < 0.05). A cut-off value of 0.51 for rCBF was able to discriminate between medulloblastoma and pilocytic astrocytoma, generating a sensitivity of 88%, a specificity of 75%, and an AUC of 83.5%. The rCBF measurement, obtained during MRI with 3D pseudo-continuous ASL, plays a supplemental role in the differentiation of medulloblastoma from pilocytic astrocytoma.
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http://dx.doi.org/10.3389/fped.2020.598190DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982871PMC
March 2021

Laryngotracheobronchial amyloidosis: A case report.

Respir Med Case Rep 2021 4;32:101377. Epub 2021 Mar 4.

Department of Radiology, Ha Noi Medical University, Ha Noi, Viet Nam.

Primary laryngotracheobronchial amyloidosis is a rare pulmonary disease that can cause endobronchial stenosis. This disease has never previously been reported in Vietnam. We aimed to report a laryngotracheobronchial amyloidosis case in a 43-year-old female, which may be the first reported case in Vietnam. The patient had a 4-year history of progressive hoarseness, dyspnea, and hemoptysis. Multiple bronchial biopsies combined with detailed clinical information suggested an amyloidosis disease. Red congo staining was positive in bronchial samples, and a further workup found positive red congo staining in subcutaneous fatty tissue biopsy samples. Tracheostomy was performed due to severe dyspnea related to laryngeal stenosis. A multidisciplinary consultation was held, and chemotherapy with melphalan and dexamethasone were prescribed due to the systemic effects of the disease. After 2 cycles of chemotherapy, the patient showed improvement in dyspnea and cough. Due to the inexperience of both the clinicians and pathologists, this case was diagnosed quite late. In the future, if this diagnosis is considered in the differential diagnosis, an earlier diagnosis and better treatment outcome can be reached.
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http://dx.doi.org/10.1016/j.rmcr.2021.101377DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7972980PMC
March 2021

A Case of Renal Inflammatory Pseudotumor Leading to Nephrectomy.

J Investig Med High Impact Case Rep 2021 Jan-Dec;9:23247096211003224

Department of Radiology, Hanoi Medical University Hospital, Hanoi, Vietnam.

Inflammatory pseudotumor (IPT) of the kidney is a rare benign disorder with unknown etiology. In IPT patients, some nonspecific symptoms might present, such as fever, hematuria, and back pain. As it can appear on computed tomography and magnetic resonance imaging as a hypovascular mass with surrounding fat stranding, IPT can be misdiagnosed as a primary tumor. Since the clinical symptoms, radiographic features, and preoperative findings can be inconsistent, it is imperative to confirm IPT based on histopathological assessment. In the present study, we describe a case of renal IPT in a 13-year-old girl. The patient was treated with nephrectomy of the right kidney since the preoperative diagnosis was renal carcinoma. Pathological examination revealed an IPT. This article emphasizes the importance of preoperative definitive diagnosis in avoiding unnecessary nephrectomy.
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http://dx.doi.org/10.1177/23247096211003224DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7985938PMC
March 2021

An Extremely Rare Case of Splenic Rupture Secondary to Metastatic Gestational Choriocarcinoma.

World J Oncol 2021 Feb 10;12(1):39-43. Epub 2021 Feb 10.

Department of Radiology, Ha Noi Medical University Hospital, Ha Noi, Vietnam.

Gestational choriocarcinoma (GC) is an uncommon malignant tumor consisting of trophoblastic cells. The lungs, liver, and central nervous system are the most common metastatic sites for this disease. However, splenic metastasis is unusual and might result in spontaneous rupture. Symptoms associated with splenic rupture may be the first presentation of malignancy. A thorough medical history and examination are necessary to detect the primary lesion. Herein, we present a case of a 23-year-old female who had splenic rupture secondary to choriocarcinoma metastasis. Although the emergency condition had been solved, the patient died 1 month after due to brain metastasis. The goal of this article was to report a new case of spontaneous splenic rupture caused by choriocarcinoma metastasis and to review the existing literature on splenic metastases associated with GC, including the epidemiology and etiology.
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http://dx.doi.org/10.14740/wjon1356DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7935620PMC
February 2021

Benign ureteral polyps causing upper urinary tract obstruction.

Urol Case Rep 2021 Jul 26;37:101619. Epub 2021 Feb 26.

Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Viet Nam.

Ureteral fibroepithelial polyps are benign, mesodermal neoplasms that can cause upper urinary tract obstruction. The preoperative diagnosis of this disease is challenging, but multidetector computed tomography (CT), particularly CT urography in the excretory phase, can be used to detect the features of ureteral polyps. We illustrated a case preoperatively diagnosed as upper ureteral tract obstruction due to ureteral tumor based on clinical presentation and CT imaging. However, the histopathological report revealed ureteral fibroepithelial polyps. Ureteral fibroepithelial polyps should be considered as a rare cause of urinary obstruction when the clinical presentation and imaging findings are atypical for more common etiologies.
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http://dx.doi.org/10.1016/j.eucr.2021.101619DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7930583PMC
July 2021

Subcapsular urinoma following metastasis of testicular embryonal carcinoma.

Urol Case Rep 2021 Jul 24;37:101615. Epub 2021 Feb 24.

Department of Radiology, Hanoi Medical University Hospital, Ha Noi, Viet Nam.

Urinoma is an uncommon and severe complication that commonly results from ureteral stone formation, causing urinary tract obstruction, urinary tract trauma, or a pelvis mass. Ureter perforation due to malignancy, leading to subcapsular urinoma, is rare. In this article, we aimed to describe a case of secondary subcapsular urinoma in an adult male. The patient was diagnosed with ureter perforation secondary to the invasion of embryonal carcinoma lymph node metastasis.
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http://dx.doi.org/10.1016/j.eucr.2021.101615DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7930576PMC
July 2021

The first case of spp. pneumonia reported in Vietnam.

Respir Med Case Rep 2021 18;32:101371. Epub 2021 Feb 18.

Department of Radiology, Ha Noi Medical University, Ha Noi, Viet Nam.

A respiratory fungal infection is a severe clinical problem caused by endemic or opportunistic fungi. Although pulmonary fungal infections may be associated with no symptoms, the patient may also present with cough, fever, chest pain, and hemoptysis. spp., a dermatophyte fungus, is a dermatologic pathogen and can cause a deep, sometimes fatal infection. Here, we report the first case of a deep spp. Infection in Vietnam and possibly the first case of spp. pneumonia in the literature, which responded completely to medical therapy. This article highlights the epidemiology of fungal lung infections and describes the clinical approach for when to suspect and how to diagnose this disease.
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http://dx.doi.org/10.1016/j.rmcr.2021.101371DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7910523PMC
February 2021

Congenital bronchobiliary fistula: a case report and literature review.

Respirol Case Rep 2021 Apr 28;9(4):e00731. Epub 2021 Feb 28.

Department of Respirology Children's Hospital 2 Ho Chi Minh City Vietnam.

Congenital bronchobiliary fistula (CBBF) is a very rare malformation associated with clinical symptoms of dyspnoea, vomiting, cyanosis, persistent pneumonia, and poor response to antibiotics. Typical imaging techniques used to diagnose this malformation include bronchography, computed tomography (CT), cholangiography, hepatobiliary nuclear imaging, and magnetic resonance imaging (MRI). We diagnosed a case of CBBF that was initially diagnosed as non-resolving pneumonia. CT and fistulography were used to obtain the correct diagnosis. The fistula was confirmed by fistulography under the guidance of bronchoscopy. Surgical excision of the fistulous tract was performed, with complete recovery. The aim of this report was to emphasize the epidemiology and clinical features of CBBF patients.
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http://dx.doi.org/10.1002/rcr2.731DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7917270PMC
April 2021

A rare case report of breast sarcoma.

Radiol Case Rep 2021 May 24;16(5):1047-1050. Epub 2021 Feb 24.

Department of Radiology, Ha Noi Medical University, Ha Noi, Vietnam.

Malignant tumors that originate from the mesenchymal tissue of the mammary gland, known as breast sarcomas, are very rare and can be divided into 2 types: primary and secondary (therapy-related development). Breast sarcomas are aggressive tumors associated with a poor prognosis. Treatment options include the coordination of surgery, chemotherapy, and radiotherapy. We present a case of a 51-year-old female who presented to the hospital after noticing a palpable mass in the left breast and bloody nipple discharge. These symptoms lasted for more than 4 months. Postoperative histopathology revealed an undifferentiated pleomorphic breast sarcoma. After 8 months of treatment, the patient experienced metastasis to the brain and lungs.
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http://dx.doi.org/10.1016/j.radcr.2021.02.035DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7917451PMC
May 2021

The diagnostic function of intravoxel incoherent motion for distinguishing between pilocytic astrocytoma and ependymoma.

Authors:
Nguyen Minh Duc

PLoS One 2021 1;16(3):e0247899. Epub 2021 Mar 1.

Doctoral Program, Department of Radiology, Hanoi Medical University, Hanoi, Vietnam.

Introduction: Intravoxel incoherent motion (IVIM) imaging concurrently measures diffusion and perfusion parameters and has potential applications for brain tumor classification. However, the effectiveness of IVIM for the differentiation between pilocytic astrocytoma and ependymoma has not been verified. The aim of this study was to determine the potential diagnostic role of IVIM for the distinction between ependymoma and pilocytic astrocytoma.

Methods: Between February 2019 and October 2020, 22 children (15 males and 7 females; median age 4 years) with either ependymoma or pilocytic astrocytoma were recruited for this prospective study. IVIM parameters were fitted using 7 b-values (0-1,500 s/mm2), to develop a bi-exponential model. The diffusivity (D), perfusion fraction (f), and pseudo diffusivity (D*) were measured in both tumors and the adjacent normal-appearing parenchyma. These IVIM parameters were compared using the Mann-Whitney U test. Receiver operating characteristic (ROC) curve analysis was employed to assess diagnostic performance.

Results: The median D values for ependymoma and pilocytic astrocytoma were 0.87 and 1.25 × 10-3 mm2/s (p < 0.05), respectively, whereas the f values were 0.11% and 0.15% (p < 0.05). The ratios of the median D values for ependymoma and pilocytic astrocytoma relative to the median D values for the adjacent, normal-appearing parenchyma were 1.45 and 2.10 (p < 0.05), respectively. ROC curve analysis found that the D value had the best diagnostic performance for the differentiation between pilocytic astrocytoma and ependymoma, with an area under the ROC curve of 1.

Conclusion: IVIM is a beneficial, effective, non-invasive, and endogenous-contrast imaging technique. The D value derived from IVIM was the most essential factor for differentiating ependymoma from pilocytic astrocytoma.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0247899PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7920344PMC
March 2021

The Role of Shear Wave Elastography in the Discrimination Between Malignant and Benign Thyroid Nodules.

Acta Inform Med 2020 Dec;28(4):248-253

Department of Radiology, Hanoi Medical University, Hanoi, Vietnam.

Background: Grayscale ultrasound (US) is the most common imaging modality for the assessment of thyroid nodules.

Objective: This research aimed to assess the value of using the elasticity index (EI), obtained using shear wave elastography (SWE), to discriminate between malignant and benign thyroid nodules.

Materials And Methods: A total of 86 patients (94 distinct thyroid nodules) were operated on at Vietnam National Cancer Hospital from June 2018 to June 2019. Comparisons of the grayscale ultrasound (US) findings and the EI values between the benign and malignant groups were performed using the Chi-square test and Student's -test, respectively. The discrimination abilities of EI were determined through receiver operating characteristic (ROC) curve analysis, with the computation of optimal cut-off points.

Results: The EI values of the benign and malignant groups were 37.6 ± 26.1 kPa and 105.4 ± 48.8 kPa, respectively. The area under the ROC curve (AUROC) value for discrimination between groups based on EI values was 0.889 when using an optimal cut-off point of 74.5 kPa, which resulted in a sensitivity of 74.3% and a specificity of 90%. Logistic multivariate regression analysis found that EI and microcalcification were significant factors for the discrimination between groups, with an odds ratio (OR): 1.487 [95% confidence interval (95% CI): 1.124-1.968, p = 0.005] and OR: 12.119 (95% CI: 2.031-72.323, p = 0.006), respectively. Combining grayscale US imaging with SWE can increase the specificity of the diagnosis but does not increase the accuracy.

Conclusion: SWE can be helpful for predicting the malignancy of thyroid nodules, although the accuracy of this method is only moderate.
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http://dx.doi.org/10.5455/aim.2020.28.248-253DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7879443PMC
December 2020

Use of Mini-Percutaneous Nephrolithotomy Technique to Remove Extra-Peritoneal Foreign Bodies.

Am J Case Rep 2021 Feb 24;22:e929731. Epub 2021 Feb 24.

Department of Radiology, Hanoi Medical University, Hanoi, Vietnam.

BACKGROUND Foreign bodies (FBs) in the intra- or extra-peritoneal cavity are relatively rare. The aim of treatment is to remove the FB to prevent chronic inflammation and/or infection. Traditionally, surgical management is necessary, as the detection and localization of FBs can be difficult. Mini-percutaneous nephrolithotomy (Mini-PCNL) under the guidance of ultrasonography (US-guided) has recently been used as an alternative to conventional therapeutic options for FB removal. CASE REPORT In this article, we report the cases of 2 patients with an extra-peritoneal wooden toothpick FB treated using the mini-percutaneous nephrolithotomy technique as an effective treatment for removing the FBs. These patients recovered quickly and were discharged uneventfully. CONCLUSIONS Using ultrasound to guide mini-PCNL represents a potential alternative to laparoscopic surgery for the detection and removal of FBs, allowing the patient to recover quickly. This approach is simple, minimally invasive, and feasible under local anesthesia and should be considered as an alternative to surgery.
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http://dx.doi.org/10.12659/AJCR.929731DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7916744PMC
February 2021

Intrinsic Third Ventricular Papillary Craniopharyngioma: A Report of Five Cases and Literature Review.

Int Med Case Rep J 2021 15;14:83-87. Epub 2021 Feb 15.

Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam.

Background: Craniopharyngiomas are common lesions that occur in the suprasellar region; however, strictly intrinsic third ventricular craniopharyngiomas are rare.

Case Series: We aimed to describe the magnetic resonance imaging features observed in five cases of strictly intrinsic third ventricular papillary craniopharyngiomas, including two cases of mixed cystic and solid tumors and three cases of pure solid masses.

Conclusion: Among the adult population, intrinsic third ventricular papillary craniopharyngiomas should be considered when either solid or mixed cystic and solid masses are observed, in which the solid component shows heterogeneous intensity, heterogeneous and strong enhancement, and is strictly located in the third ventricle.
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http://dx.doi.org/10.2147/IMCRJ.S295848DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7894859PMC
February 2021

Two rare cases of horseshoe lung with scimitar syndrome in Vietnam.

Respir Med Case Rep 2021 31;32:101357. Epub 2021 Jan 31.

Department of Radiology, Children's Hospital 2, Ho Chi Minh City, Viet Nam.

Horseshoe lung is a rare, congenital, pulmonary anomaly in which the caudal and basal segments of the left and right lungs are joined together. Most cases of horseshoe lung are associated with scimitar syndrome. Horseshoe lung can be diagnosed using pulmonary angiography, showing that the isthmus of the pulmonary parenchyma crosses the midline into the contralateral side. The isthmus parenchyma is typically supplied by the hypoplastic pulmonary artery. Clinical symptoms, therapeutic methods, and prognosis depend on the incidence of pulmonary hypertension, heart failure, recurrent pneumonia, and other combinations of congenital malformations. In this article, we describe two cases of horseshoe lung associated with scimitar syndrome and pulmonary malformation.
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http://dx.doi.org/10.1016/j.rmcr.2021.101357DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7876558PMC
January 2021