4,863 results match your criteria Hepatocellular Adenoma

Prominent Pseudoacini in Focal Nodular Hyperplasia: A Potential Diagnostic Pitfall.

Am J Surg Pathol 2022 Jun 22. Epub 2022 Jun 22.

Department of Pathology, Yale School of Medicine, New Haven, CT.

Pseudoacini are generally a morphologic feature of hepatocellular carcinoma (HCC), being absent or rare in benign hepatocytic tumors, such as hepatocellular adenoma. However, rarely these can be seen in focal nodular hyperplasia (FNH) and may pose diagnostic challenges, especially when prominent. The study was aimed to evaluate the occurrence of pseudoacini in FNH and their clinicopathologic correlations. Read More

View Article and Full-Text PDF

Spontaneous neoplasms in harbour porpoises Phocoena phocoena.

Dis Aquat Organ 2022 Jun 23;149:145-154. Epub 2022 Jun 23.

Department of Pathology, University of Veterinary Medicine Hannover, Foundation, Bünteweg 17, 30559 Hannover, Germany.

Harbour porpoises are widely distributed in the North Atlantic and represent the most abundant cetacean species in the North and Baltic Seas. Spontaneous neoplasms are relatively rarely reported in cetaceans, and only little is known about neoplasia in harbour porpoises. Thus, archival material was reviewed for spontaneous neoplasms in harbour porpoises recorded during post-mortem examinations between 1999 and 2018. Read More

View Article and Full-Text PDF

Ectopic Fetal Liver Tissue in the Placenta of a Twin Pregnancy: A Case Report and Review of Literature.

Case Rep Pathol 2022 13;2022:1966025. Epub 2022 Jun 13.

Department of Pathology, Centre Hospitalier Universitaire Brugmann, Place Arthur Van Gehuchten 4, 1020 Brussels, Belgium.

Ectopic liver tissue represents a rare entity and is mostly attributed to events occurring during embryogenesis. Previous case reports documented the presence of fetal liver parenchyma within temporarily developed organs during pregnancy, such as the placenta or the umbilical cord. Moreover, the terminology of these benign findings varies from "ectopic liver" to "hepatocellular adenoma-like neoplasm" or "hepatocellular adenoma". Read More

View Article and Full-Text PDF

Focal Nodular Hyperplasia and Focal Nodular Hyperplasia-like Lesions.

Radiographics 2022 Jun 10:210156. Epub 2022 Jun 10.

From the Department of Radiology (J.D.L., C.W.B., A.W.B., M.P.C., F.K.C., K.L.C., R.S., B.B.T., L.F.A.) and Department of Laboratory Medicine and Pathology (J.T.L.), Mayo Clinic Florida, 4500 San Pablo Rd, Jacksonville, FL 32224.

Focal nodular hyperplasia (FNH) is a benign lesion occurring in a background of normal liver. FNH is seen most commonly in young women and can often be accurately diagnosed at imaging, including CT, MRI, or contrast-enhanced US. In the normal liver, FNH frequently must be differentiated from hepatocellular adenoma, which although benign, is managed differently because of the risks of hemorrhage and malignant transformation. Read More

View Article and Full-Text PDF

Safety and feasibility of contrast-enhanced computed tomography with a nanoparticle contrast agent for evaluation of diethylnitrosamine-induced liver tumors in a rat model.

Acad Radiol 2022 Jun 6. Epub 2022 Jun 6.

Department of Diagnostic and Interventional Radiology, Graduate School of Medicine (T.N., K.K., A.Y., H.Y., A.J., E.S., K.M., S.O., Y.M.), Osaka City University (currently Osaka Metropolitan University), 1-4-3 Asahimachi, Abenoku, Osaka 545-8585, Japan.

Rationale And Objectives: Safety and feasibility of contrast-enhanced computed tomography (CECT) with a nanoparticulate contrast agent, ExiTron nano 12000, was evaluated in a rat liver tumor model.

Materials And Methods: This study employed eighteen 8-week-old male F344 rats. Six rats given tap water for 8 weeks further divided into two: Control group and Normal Liver with CECT group. Read More

View Article and Full-Text PDF

Fat in mass in primary liver lesions: are usual MRI diagnostic criteria of both malignant and benign liver lesions still applicable?

Abdom Radiol (NY) 2022 Jul 7;47(7):2347-2355. Epub 2022 Jun 7.

Department of Radiology, APHP, HU Henri Mondor, Creteil, Val-de-Marne, France.

Purpose: To evaluate the accuracy of the usual MRI diagnostic patterns of primary liver lesions applied to the diagnosis of pathologically proven fat-containing liver lesions.

Materials And Methods: This monocentric IRB approved retrospective study included all patients with pathologically proven focal liver lesions and documented intra-tumoral fat on pathology and who underwent preoperative liver MRI for characterization. Both liver morphology and usual lesion MRI features were analyzed and their distribution correlated to the final pathological result (Khi-2 or Fisher exact tests, Student t-test or Mann-Whitney U test, as appropriate). Read More

View Article and Full-Text PDF

Stereotactic radiofrequency ablation as a valid first-line treatment option for hepatocellular adenomas.

Int J Hyperthermia 2022 ;39(1):780-787

Interventional Oncology-Microinvasive Therapy (SIP), Department of Radiology, Medical University Innsbruck, Innsbruck, Austria.

Objectives: This study aimed to assess the safety and efficacy of stereotactic radiofrequency ablation (SRFA) in patients with hepatocellular adenomas (HCA).

Methods: Retrospective analyses of all patients referred for SRFA treatment at our institution between January 2010 and October 2020 revealed 14 patients (10 women; mean age 34.4 [range, 17-73 years]) with 38 HCAs treated through 18 ablation sessions. Read More

View Article and Full-Text PDF

Primary hepatic neuroendocrine carcinoma with colon adenoma: A case report with literature review.

Int J Surg Case Rep 2022 Jun 10;95:107176. Epub 2022 May 10.

Department of General Surgery, The First Hospital of Jiaxing (The First Affiliated Hospital of Jiaxing University), Jiaxing, Zhejiang 314001, PR China.

Introduction And Importance: Primary hepatic neuroendocrine tumors (PHNETs) are extremely rare, and the clinical symptoms, test results, and imaging characteristics are nonspecific in most patients; thus, it is difficult to differentiate from other liver masses before surgery. Histopathology and immunohistochemistry are the main basis for the diagnosis. PHNETs and colon tumors co-occur in a patient and are non-homologous, as reported in the English-language literature for the first time. Read More

View Article and Full-Text PDF

An Overview of Neoplasia in Captive Wild Felids in Southern Italy Zoos.

Front Vet Sci 2022 10;9:899481. Epub 2022 May 10.

Unit of Pathology, Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy.

The aim of this study was to evaluate the frequency of neoplasms in captive wild felids in Southern Italy zoos over a 13-year period (2008-2021) and to investigate macroscopic and histologic tumor findings in these animals. A total of 24 cases were necropsied, 9 males and 15 females, with age ranging from 6 to 19 years, including 12 tigers (), 7 leopards (), 4 lions (), and 1 black jaguar (). Diagnosis of neoplasm was made in 14/24 cases (58. Read More

View Article and Full-Text PDF

Hepatocellular adenoma: Where are we now?

World J Gastroenterol 2022 Apr;28(14):1384-1393

Department of Pathology, Yale University School of Medicine, New Haven, CT 06520, United States.

Hepatocellular adenoma (HCA) is a benign hepatocellular neoplasm, commonly occurs in young women with a history of oral contraceptive use. Complications including hemorrhage and malignant transformation necessitate the need for a thorough understanding of the underlying molecular signatures in this entity. Recent molecular studies have significantly expanded our knowledge of HCAs. Read More

View Article and Full-Text PDF

MEG8:An Indispensable Long Non-coding RNA in Multiple Cancers.

Curr Pharm Des 2022 May 16. Epub 2022 May 16.

Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, Yichang 443002, China.

Background: As a member of long non-coding RNAs (lncRNAs), maternally expressed gene 8 (MEG8) has been found involving in the progression of a variety of cancers and playing a regulatory role. Therefore, MEG8 may turn into a new therapeutic target for cancer in the future. The purpose of this review is to illustrate the molecular mechanism and physiological function of MEG8 in various cancers. Read More

View Article and Full-Text PDF

Radiomics Study for Differentiating Focal Hepatic Lesions Based on Unenhanced CT Images.

Front Oncol 2022 27;12:650797. Epub 2022 Apr 27.

Department of Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.

Objectives: To investigate the feasibility of computer-aided discriminative diagnosis among hepatocellular carcinoma (HCC), hepatic metastasis, hepatic hemangioma, hepatic cysts, hepatic adenoma, and hepatic focal nodular hyperplasia, based on radiomics analysis of unenhanced CT images.

Methods: 452 patients with 77 with HCC, 104 with hepatic metastases, 126 with hepatic hemangioma, 99 with hepatic cysts, 24 with FNH, 22 with HA, who underwent CT examination from 2016 to 2018, were included. Radcloud Platform was used to extract radiomics features from manual delineation on unenhanced CT images. Read More

View Article and Full-Text PDF

Multidisciplinary Simulation Improves Resident Confidence for Pregnant Patients Requiring Surgical Intervention.

Cureus 2022 Mar 24;14(3):e23454. Epub 2022 Mar 24.

Simulation, Riverside Methodist Hospital/OhioHealth, Columbus, USA.

Introduction: Hepatocellular adenomas are a rare but serious cause of bleeding, which is further complicated by pregnancy. Interprofessional cooperation is a key component of residency education, thus simulations designed to integrate multiple programs are mutually beneficial. This simulation details surgical and obstetric management of a pregnant patient in hemorrhagic shock from a bleeding hepatocellular adenoma. Read More

View Article and Full-Text PDF

Differentiation of hepatocellular adenoma by subtype and hepatocellular carcinoma in non-cirrhotic liver by fractal analysis of perfusion MRI.

Insights Imaging 2022 Apr 28;13(1):81. Epub 2022 Apr 28.

Université de Paris, CRI, U1149, Paris, France.

Background: To investigate whether fractal analysis of perfusion differentiates hepatocellular adenoma (HCA) subtypes and hepatocellular carcinoma (HCC) in non-cirrhotic liver by quantifying perfusion chaos using four-dimensional dynamic contrast-enhanced magnetic resonance imaging (4D-DCE-MRI).

Results: A retrospective population of 63 patients (47 female) with histopathologically characterized HCA and HCC in non-cirrhotic livers was investigated. Our population consisted of 13 hepatocyte nuclear factor (HNF)-1α-inactivated (H-HCAs), 7 β-catenin-exon-3-mutated (b-HCAs), 27 inflammatory HCAs (I-HCAs), and 16 HCCs. Read More

View Article and Full-Text PDF

MRI Appearance of Focal Lesions in Liver Iron Overload.

Diagnostics (Basel) 2022 Apr 2;12(4). Epub 2022 Apr 2.

Department of Radiology, IRCSS Azienda Ospedaliero Universitaria di Bologna, 40138 Bologna, Italy.

Liver iron overload is defined as an accumulation of the chemical element Fe in the hepatic parenchyma that exceeds the normal storage. When iron accumulates, it can be toxic for the liver by producing inflammation and cell damage. This can potentially lead to cirrhosis and hepatocellular carcinoma, as well as to other liver lesions depending on the underlying condition associated to liver iron overload. Read More

View Article and Full-Text PDF

Subtyping of hepatocellular adenoma: a machine learning-based approach.

Virchows Arch 2022 Jul 7;481(1):49-61. Epub 2022 Apr 7.

Department of Laboratory Medicine and Pathology, University of Washington School of Medicine, 1959 NE Pacific Street, NE140D, Seattle, WA, 98195-6100, USA.

Subtyping of hepatocellular adenoma (HCA) is an important task in practice as different subtypes may have different clinical outcomes and management algorithms. Definitive subtyping is currently dependent on immunohistochemical and molecular testing. The association between some morphologic/clinical features and HCA subtypes has been reported; however, the predictive performance of these features has been controversial. Read More

View Article and Full-Text PDF

Ketohexokinase-mediated fructose metabolism is lost in hepatocellular carcinoma and can be leveraged for metabolic imaging.

Sci Adv 2022 Apr 6;8(14):eabm7985. Epub 2022 Apr 6.

Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.

The ability to break down fructose is dependent on ketohexokinase (KHK) that phosphorylates fructose to fructose-1-phosphate (F1P). We show that KHK expression is tightly controlled and limited to a small number of organs and is down-regulated in liver and intestinal cancer cells. Loss of fructose metabolism is also apparent in hepatocellular adenoma and carcinoma (HCC) patient samples. Read More

View Article and Full-Text PDF

Hepatic Adenomas in Patients 60 and Older Are Enriched for HNF1A Inactivation and Malignant Transformation.

Am J Surg Pathol 2022 06 6;46(6):786-792. Epub 2022 Apr 6.

Division of Anatomic Pathology, Mayo Clinic, Rochester, MN.

Hepatic adenomas occur most commonly in women between the ages of 20 and 40 years, but rarely they occur in older aged persons, including those 60 years of age or older. This group of adenomas, however, has not been systemically examined. Twenty-six hepatic adenomas in persons 60 years of age or older were studied, along with a control group of 50 hepatic adenomas in persons aged 30 to 39. Read More

View Article and Full-Text PDF

Serum vascular endothelial growth factor in dogs with various proliferative diseases.

J Vet Med Sci 2022 May 4;84(5):720-725. Epub 2022 Apr 4.

Laboratory of Veterinary Surgery, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kanagawa, Japan.

Angiogenesis plays an important role in the proliferation and metastasis mechanisms of malignant tumors. Vascular endothelial growth factor (VEGF), a group of cytokines that contribute to angiogenesis and vasculogenesis. This study aimed to investigate the serum VEGF-A concentrations in dogs with various proliferative diseases. Read More

View Article and Full-Text PDF

Transient infantile hypertriglyceridaemia due to homozygous mutation in GPD1 presenting in childhood with hepatic adenoma.

BMJ Case Rep 2022 Apr 1;15(4). Epub 2022 Apr 1.

Pediatric Gastroenterology and Hepatology, Indraprastha Apollo Hospital, New Delhi, Delhi, India.

Hypertriglyceridaemia in infancy is usually secondary to underlying metabolic disorder which usually has a genetic basis unlike the adult population. One such recently described entity is transient infantile hypertriglyceridaemia (HTGTI). In this disorder, mutation in glycerol-3-phosphate (G3P) dehydrogenase gene leads to deficiency of G3P dehydrogenase resulting in hypertriglyceridaemia and hepatomegaly. Read More

View Article and Full-Text PDF

Large Hepatic Adenomas and Hepatic Adenomatosis: A multicenter study of risk factors, interventions, and complications.

Am J Gastroenterol 2022 Mar 23. Epub 2022 Mar 23.

Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine.

Introduction: Beyond oral contraceptives (OC), metabolic factors have been suggested to increase risk for hepatocellular adenoma (HCA). Impact of risks remain poorly defined, particularly among males and those with adenomatosis. Thus, we aimed to examine HCA clinical and outcome characteristics through a large multicenter cohort. Read More

View Article and Full-Text PDF

Incidental Liver Lesions in children: A practical and evidence-based approach.

Clin Res Hepatol Gastroenterol 2022 May 19;46(5):101904. Epub 2022 Mar 19.

Pediatric Gastroenterology Unit, Centro Materno Infantil do Norte, Centro Hospitalar Universitário do Porto, Largo da Maternidade de Júlio Dinis 45, Porto 4050-651, Portugal.

Incidental liver lesions are increasingly being discovered in the context of the increased use of ultrasound studies and the majority are benign. In children, although individually rare, the differential diagnosis is broad and therefore a systematic approach is of utmost importance to reduce the radiological and disease burden in children and their families. This review article collected current evidence and provides fundamental information for the clinician regarding specific differential diagnoses and unique imaging features of benign liver lesions in children. Read More

View Article and Full-Text PDF

Evaluation of the human hazard of the liver and lung tumors in mice treated with permethrin based on mode of action.

Crit Rev Toxicol 2022 01 11;52(1):1-31. Epub 2022 Mar 11.

Department of Pathology and Microbiology, Havlik-Wall Professor of Oncology, University of Nebraska Medical Center, 983135 Nebraska Medical Center, Omaha, NE, USA.

The non-genotoxic synthetic pyrethroid insecticide permethrin produced hepatocellular adenomas and bronchiolo-alveolar adenomas in female CD-1 mice, but not in male CD-1 mice or in female or male Wistar rats. Studies were performed to evaluate possible modes of action (MOAs) for permethrin-induced female CD-1 mouse liver and lung tumor formation. The MOA for liver tumor formation by permethrin involves activation of the peroxisome proliferator-activated receptor alpha (PPARα), increased hepatocellular proliferation, development of altered hepatic foci, and ultimately liver tumors. Read More

View Article and Full-Text PDF
January 2022

Ectopic liver in a five-week-old embryo.

Rom J Morphol Embryol 2021 Jul-Sep;62(3):841-844

Department of Basic Medical Sciences, Section of Medicine, Faculty of Health Sciences, University of La Laguna, Tenerife, Canary Islands, Spain;

The first case of a placental tumor composed of benign hepatic tissue was published in 1986 and considered a placental benign hepatocellular adenoma. Since then, this lesion is better known as ectopic liver, and a total of 12 cases have been published. The ectopic liver located in the umbilical cord is an even rarer alteration, with only nine cases described to date. Read More

View Article and Full-Text PDF

Coordinated Cross-Talk Between the Myc and Mlx Networks in Liver Regeneration and Neoplasia.

Cell Mol Gastroenterol Hepatol 2022 5;13(6):1785-1804. Epub 2022 Mar 5.

Division of Hematology/Oncology, Children's Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania; Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania; Hillman Comprehensive Cancer Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania; Department of Microbiology and Molecular Genetics, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania. Electronic address:

Background & Aims: The c-Myc (Myc) Basic helix-loop-helix leucine zipper (bHLH-ZIP) transcription factor is deregulated in most cancers. In association with Max, Myc controls target genes that supervise metabolism, ribosome biogenesis, translation, and proliferation. This Myc network crosstalks with the Mlx network, which consists of the Myc-like proteins MondoA and ChREBP, and Max-like Mlx. Read More

View Article and Full-Text PDF

Cellular origins of regenerating liver and hepatocellular carcinoma.

JHEP Rep 2022 Apr 13;4(4):100416. Epub 2021 Dec 13.

Liver Tumor Program, Division of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.

Hepatocellular carcinoma (HCC) is the predominant primary cancer arising from the liver and is one of the major causes of cancer-related mortality worldwide. The cellular origin of HCC has been a topic of great interest due to conflicting findings regarding whether it originates in hepatocytes, biliary cells, or facultative stem cells. These cell types all undergo changes during liver injury, and there is controversy about their contribution to regenerative responses in the liver. Read More

View Article and Full-Text PDF

Malignant transformation of hepatocellular adenoma.

JHEP Rep 2022 Mar 7;4(3):100430. Epub 2022 Jan 7.

Inserm, BRIC1312, University Bordeaux, Bordeaux, France.

View Article and Full-Text PDF

Tumour to tumour metastasis: case of a carotid body paraganglioma metastatic to a hepatocellular adenoma.

BMJ Case Rep 2022 Mar 2;15(3). Epub 2022 Mar 2.

Surgery, The University of British Columbia, Vancouver, British Columbia, Canada.

Tumour to tumour metastases are uncommon, and we report a case of carotid body paraganglioma metastatic to a hepatocellular adenoma. A 54-year-old man presented after a CT chest for chronic cough that incidentally identified two liver lesions in segment 3 and caudate. The imaging findings were suspicious for atypical haemangiomas versus hepatocellular adenoma. Read More

View Article and Full-Text PDF

Living Donor Liver Transplantation as a Backup Procedure: Treatment Strategy for Hepatocellular Adenomas Requiring Complex Resections.

Case Rep Surg 2022 17;2022:1015061. Epub 2022 Feb 17.

Liver Transplant Unit, Hospital Sirio-Libanes, São Paulo, Brazil.

Methods: We present a series of three patients with large hepatocellular adenoma lesions showing a central location, for which the living donor liver transplantation strategy was used as a backup procedure.

Results: Hepatocellular adenoma was confirmed by biopsy in all patients. Surgical resection was indicated because of the patients' symptoms and lesion size and growth. Read More

View Article and Full-Text PDF
February 2022

Single-cell transcriptomic profiling unravels the adenoma-initiation role of protein tyrosine kinases during colorectal tumorigenesis.

Signal Transduct Target Ther 2022 02 28;7(1):60. Epub 2022 Feb 28.

Laboratory of Integrative Medicine, Clinical Research Center for Breast, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, 610041, Chengdu, Sichuan, China.

The adenoma-carcinoma sequence is a well-accepted roadmap for the development of sporadic colorectal cancer. However, cellular heterogeneity in aberrant epithelial cells limits our understanding of carcinogenesis in colorectal tissues. Here, we performed a single-cell RNA sequencing survey of 54,788 cells from patient-matched tissue samples, including blood, normal tissue, para-cancer, polyp, and colorectal cancer. Read More

View Article and Full-Text PDF
February 2022