Publications by authors named "Masashi Yahagi"

12 Publications

  • Page 1 of 1

Usefulness of laparoscopic surgery and preoperative examinations for chronic recurrent small bowel obstruction.

Surg Today 2021 May 10;51(5):807-813. Epub 2021 Jan 10.

Department of Surgery, Kitasato University Kitasato Institute Hospital, Shirokane 5-9-1, Minato-ku, Tokyo, 108-8642, Japan.

Purpose: The aim of this study was to investigate the usefulness of laparoscopic surgery for patients with postoperative abdominal symptoms, including chronic recurrent small-bowel obstruction (SBO), and preoperative examinations of barium follow-through and computed tomography (CT) to predict the postoperative outcomes of laparoscopic surgery.

Methods: Between 2016 and 2018, 49 patients with postoperative symptoms were treated by laparoscopic surgery at our institute. The data from two preoperative examinations were available for 42 patients. The patients were divided into 4 groups: CT-positive (CP, n = 18), barium follow-through-positive (BP, n = 1), both positive (AP [all positive] n = 13), and both negative (AN [all negative], n = 10).

Results: Among the 49 patients, 41 received pure laparoscopic surgery, 7 received laparoscopic-assisted surgery with mini-laparotomy, and 1 required conversion. Intra- and postoperative complications occurred in two and seven patients, respectively. Improvement of abdominal symptoms was observed in 40 patients. In terms of the medium-term outcomes, the rate of improvement of symptoms was poorer in the AN group than in the other three groups, but not to a significant degree.

Conclusion: Laparoscopic surgery was safe and feasible for patients with chronic recurrent abdominal symptoms, including SBO. Furthermore, in patients with negative results on both preoperative examinations, laparoscopic surgery may yield only poor improvement of symptoms.
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http://dx.doi.org/10.1007/s00595-020-02197-yDOI Listing
May 2021

Association of surfactant protein D with pulmonary metastases from colon cancer.

Oncol Lett 2020 Dec 5;20(6):322. Epub 2020 Oct 5.

Department of Surgery, Keio University School of Medicine, Tokyo 160-8582, Japan.

Surfactant protein D (SP-D) is a member of the collectin family of proteins, which is secreted by airway epithelial cells. SP-D serves an important role in the immune system and in the inflammatory regulation of the lung. SP-D was recently found to suppress lung cancer progression by downregulating epidermal growth factor signaling. However, the relationship between SP-D and pulmonary metastases from colon cancer remains unknown. The present study aimed to determine whether SP-D may suppress the development of the mouse rectal carcinoma cell line, CMT93, . The present study investigated the effect of SP-D on pulmonary metastases from colon cancer using SP-D knockout mice. A wound healing assay and cell invasion assay revealed that SP-D suppressed the proliferation, migration and invasion of CMT-93 cells. After injection of CMT-93 cells into the tail vein, SP-D knockout mice were significantly more susceptible to developing pulmonary metastases than C57/BL6 mice (control). Moreover, a novel cell line (CMT-93 pulmonary metastasis; CMT-93 PM) was established from the lesions of pulmonary metastases in C57/BL6 mice following injection of CMT93 into the tail vein. CMT-93 PM exhibited more robust invasion and proliferation compared to CMT93, which was unaffected by exposure to SP-D. A higher incidence of pulmonary metastases was detected following injection of CMT93 PM into the tail vein of C57/BL6 mice compared with CMT-93. Consequently, SP-D may be involved in the pathogenesis of pulmonary metastases from colon cancer.
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http://dx.doi.org/10.3892/ol.2020.12185DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7583848PMC
December 2020

Heterochronous Suture Line Recurrences in the Jejunal Pouch following Total Gastrectomy for Stage II Gastric Cancer: A Case Report and Literature Review.

Case Rep Oncol 2020 Jan-Apr;13(1):225-232. Epub 2020 Mar 19.

Department of Surgery, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan.

We report the case of a 65-year-old male who developed heterochronous local recurrences of gastric cancer in the jejunal pouch (J-pouch) four times after total gastrectomy. He underwent total gastrectomy, J-pouch, and Roux-en-Y reconstruction for stage II gastric cancer in 2005. Four local recurrences appeared on the esophago-jejunal anastomosis, the suture line within the pouch, the esophago-jejunal anastomosis, and the anastomosis between the jejunum and Y-loop, which were resected by partial excision or endoscopic submucosal dissection. Suture line recurrence of gastric cancer is rare. The common features for each recurrence included the surgically negative resection margins, observation of the same histopathological subtype, absence of remote metastasis or peritoneal seeding, and the recurrence on the anastomotic suture line, suggesting that the cause of recurrence was the implantation of exfoliated cancer cells probably in the suture line. However, there is no established procedure for preventing implantation recurrence currently, the effectiveness of lumen lavage is suggested.
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http://dx.doi.org/10.1159/000505392DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7154264PMC
March 2020

The Efficacy of PTGBD for Acute Cholecystitis Based on the Tokyo Guidelines 2018.

World J Surg 2019 11;43(11):2789-2796

Department of Surgery, Kitasato University, Kitasato Institute Hospital, Tokyo, Japan.

Backgrounds: We usually performed percutaneous transhepatic gallbladder drainage (PTGBD) for moderate and severe acute cholecystitis (AC) prior to cholecystectomy. But, the validity of preoperative drainage for AC is still controversial. The aim of this study is to evaluate the efficacy and safety of PTGBD for moderate and severe AC, based on the Tokyo Guidelines 2018.

Materials: Total of 146 AC patients from 2012 to 2017 were enrolled. Patients were classified in the grade of severity according to TG18, compared with PTGBD and non-PTGBD group. We retrospectively reviewed clinical backgrounds and laboratory data at admission. We evaluated surgical performances as the primary outcomes and recovery periods based on guidelines.

Results: A total of 61 cases were moderate, and 18 cases were severe AC, and PTGBD were performed in 34 cases. For moderate AC, age, DM rate and ASA in PTGBD group were significantly higher than those in non-PTGBD group. Also, serum albumin and hemoglobin at admission were significantly lower in the PTGBD group. However, surgical outcomes were almost the same. For severe AC patients, laparoscopic cholecystectomy was performed safely in all of pre-operating drainage cases, while almost all of non-PTGBD cases underwent open laparotomy and needed transfusion for massive bleeding.

Conclusions: Preoperative PTGBD is a useful and safe procedure for AC patients with comorbidities, especially in severe AC cases. Treatment flowchart in TG18 can be feasible to make accurate prediction for surgically high-risk patients in AC.
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http://dx.doi.org/10.1007/s00268-019-05117-5DOI Listing
November 2019

Laparoscopic surgery to treat leiomyosarcomas of the sigmoid colon:a case report and literature review.

Surg Case Rep 2019 Feb 12;5(1):20. Epub 2019 Feb 12.

Department of Surgery, Kitasato University Kitasato Institute Hospital, 5-9-1 Shirokane, Minato-ku, Tokyo, Japan.

Background: Leiomyosarcomas (LMSs) of the colon are extremely rare and highly aggressive. Although treatment of gastrointestinal LMS is not standardized, surgical resection is generally performed. The fact that the tumors are usually large at the time of diagnosis may explain why no report on laparoscopic resection of a colonic LMS has appeared.

Case Presentation: A 46-year-old male presented with hematochezia 1 month in duration. Abdominal examination including palpation was normal. The levels of several blood tumor markers were normal. Colonoscopy revealed a polypoid lesion approximately 30 mm in diameter in the sigmoid colon 30 cm from the anal verge. Contrast-enhanced computed tomography revealed that the tumor was 28 mm in diameter, and that no lymph node or distant metastasis was apparent. Histopathological examination of a biopsy specimen revealed spindle-shaped cells exhibiting significant nuclear atypia and a trabecular proliferation pattern upon hematoxylin-eosin staining. Immunohistochemically, the sample was positive for SMA and desmin, and negative for c-kit, DOG-1, CD34, and S-100. Furthermore, the Ki-67 index was > 50%. We thus diagnosed a leiomyosarcoma of the sigmoid colon without any metastasis. We performed laparoscopic sigmoid colectomy and regional lymphadenectomy using five trocars. After complete curative resection, a colorectal end-to-end anastomosis was created employing the double-stapling technique. All surgical margins were negative, and no lymph node metastasis was observed. The postoperative course was uneventful, and the patient was discharged 9 days after operation. No recurrence was noted to 1 year after surgery.

Conclusions: We report the first case of a colonic LMS treated via laparoscopic surgery. Although further work is necessary to assess prognosis and to develop the treatment further, laparoscopic surgery to treat small colonic LMSs may be feasible, being both minimally invasive and curative.
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http://dx.doi.org/10.1186/s40792-019-0579-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6372699PMC
February 2019

Short-term and midterm outcomes of single-incision laparoscopic surgery for right-sided colon cancer.

Asian J Endosc Surg 2019 Jul 27;12(3):275-280. Epub 2018 Sep 27.

Department of Surgery, Kitasato University Kitasato Institute Hospital, Tokyo, Japan.

Introduction: The purpose of this study was to clarify the usefulness of SILS for right-sided colon cancer by evaluating the short-term and midterm outcomes.

Methods: Between 2012 and 2017, 65 selected patients with right-sided colon cancer underwent ileocecal resection, right hemicolectomy, or transverse colectomy; all were enrolled in the study. The same well-trained surgeon performed each procedure by using a multi-instrument access port with three channels, which was placed at the umbilicus via an approximately 3-cm skin incision.

Results: The pathological disease stage distribution was stage 0, 4 cases; stage I, 23 cases; stage II, 19 cases; stage III, 17 cases; and stage IV, 2 cases. The surgical procedures performed were ileocecal resection, 23 cases; right hemicolectomy, 35 cases; and transverse colectomy, 7 cases. The median operative time and intraoperative blood loss were 216 min and 10 mL, respectively. Although 18 cases needed additional ports, none required conversion to open surgery. The median number of harvested lymph nodes was 24. No major perioperative morbidities occurred in this patient series. The median postoperative hospital stay was 7 days. The median follow-up period was 30 months, and the 3-year relapse-free and overall survival rates were 100% and 100%, respectively, in the stage 0-I cases and 89% and 96% in the stage II-III cases, respectively.

Conclusion: We concluded that SILS is as feasible as multiport laparoscopic surgery and a reliable surgical option in selected cases of right-sided colon cancer.
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http://dx.doi.org/10.1111/ases.12654DOI Listing
July 2019

Needlescopic versus conventional laparoscopic surgery for colorectal cancer ~a comparative study~.

J Anus Rectum Colon 2017 25;1(2):45-49. Epub 2018 May 25.

Department of Surgery, Keio University School of Medicine.

Objectives: This study set out to determine whether Needlescopic surgery (NS) produces comparable surgical outcomes for patients with colorectal cancer (CRC) compared to conventional multi-port laparoscopic surgery (MPS).

Methods: We used the five-port method with a 3.5 cm umbilical incision for extraction and reconstruction during MPS for CRC. One or two 5 mm ports were exchanged for needle forceps and all surgical procedures were as for previous MPS since July 2012. We investigated the short-term outcomes of 138 consecutive patients who underwent curative resection of CRC by NS (July 2012-August 2014) and 130 consecutive patients with CRC treated with MPS during a previous period (January 2010-June 2012).

Results: Operative time in the NS group was comparable to that of MPS (p=0.467); the NS group had significantly less estimated blood loss (p=0.002) and a shorter postoperative hospital stay (p<0.001). The mean number of dissected lymph nodes was 27 in both groups (p=0.730). No mortality occurred in either group, and similar morbidity rates were observed (p=0.454).

Conclusions: NS using Endo Relief needle forceps is a safe and feasible option compared to conventional MPS for CRC.
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http://dx.doi.org/10.23922/jarc.2016-007DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6768669PMC
May 2018

Is preoperative spirometry a predictive marker for postoperative complications after colorectal cancer surgery?

Jpn J Clin Oncol 2017 Sep;47(9):815-819

Department of Surgery, Keio University School of Medicine, Tokyo, Japan.

Background: Spirometry is a basic test that provides much information about pulmonary function; it is performed preoperatively in almost all patients undergoing colorectal cancer (CRC) surgery in our hospital. However, the value of spirometry as a preoperative test for CRC surgery remains unknown. The aim of this study was to determine whether spirometry is useful to predict postoperative complications (PCs) after CRC surgery.

Methods: The medical records of 1236 patients who had preoperative spirometry tests and underwent CRC surgery between 2005 and 2014 were reviewed. Preoperative spirometry results, such as forced vital capacity (FVC), one-second forced expiratory volume (FEV1), %VC (FVC/predicted VC) and FEV1/FVC (%FEV1), were analyzed with regard to PCs, including pneumonia.

Results: PCs were found in 383 (30.9%) patients, including 218 (56%) with surgical site infections, 67 (17%) with bowel obstruction, 62 (16%) with leakage and 20 (5.2%) with pneumonia. Of the spirometry results, %VC was correlated with PC according to logistic regression analysis (odds ratio, OR = 0.99, 95% confidence interval, CI = 0.98-0.99; P = 0.034). Multivariate analysis after adjusting for male sex, age, laparoscopic surgery, tumor location, operation time and blood loss showed that a lower %VC tends to be a risk factor for PC (OR = 0.99, 95% CI = 0.98-1.002; P = 0.159) and %VC was an independent risk factor for postoperative pneumonia in PCs (OR = 0.97, 95% CI = 0.94-0.99; P = 0.049).

Conclusions: In CRC surgery, %VC may be a predictor of postoperative complications, especially pneumonia.
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http://dx.doi.org/10.1093/jjco/hyx082DOI Listing
September 2017

Non-alcoholic fatty liver disease fibrosis score predicts hematological toxicity of chemotherapy including irinotecan for colorectal cancer.

Mol Clin Oncol 2017 Apr 1;6(4):529-533. Epub 2017 Mar 1.

Department of Surgery, Keio University School of Medicine, Tokyo 160-8582, Japan.

Liver dysfunction that may affect drug metabolism is a major concern in patients treated with chemotherapy. Thus, assessment of the degree of liver dysfunction is crucial for predicting the adverse events of chemotherapy. The non-alcoholic fatty liver disease fibrosis score (NFS) is a non-invasive clinical scoring system constructed from routine clinical and laboratory variables. The aim of this study was to evaluate whether NFS was useful for predicting the adverse events of chemotherapy including irinotecan (CPT-11) for colorectal cancer. Between January, 2007 and May, 2013, a total of 87 patients with unresectable/recurrent colorectal cancer who received first-line chemotherapy including CPT-11 were reviewed. Demographic variables, including pretreatment NFS, were retrospectively collected from medical records. The primary outcome was the association between pretreatment NFS and adverse events, such as hematological and non-hematological toxicity, of chemotherapy including CPT-11. The median pretreatment NFS was 1.302 (range, 5.158-2.620). Pretreatment NFS was an independent risk factor for hematological toxicity in a multivariate analysis (coefficient=0.932, 95% CI: 0.083-1.781; P=0.031). Receiver operating characteristic curve analysis identified 0.347 as the optimal cut-off value associated with hematological toxicity. Using this cut-off, high NFS was found to be a significant risk factor for hematological toxicity (coefficient=2.019, 95% CI: 0.239-3.798, P=0.026), but not for non-hematological toxicity (P=0.546). Therefore, based on these results, NFS appears to be a significant predictor of hematological adverse events in chemotherapy including CPT-11 for colorectal cancer and it is a non-invasive, useful tool that may be used for determining regimens or doses of chemotherapy including CPT-11.
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http://dx.doi.org/10.3892/mco.2017.1177DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5374966PMC
April 2017

The Worse Prognosis of Right-Sided Compared with Left-Sided Colon Cancers: a Systematic Review and Meta-analysis.

J Gastrointest Surg 2016 Mar 16;20(3):648-55. Epub 2015 Nov 16.

Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjyuku-ku, Tokyo, Japan.

Background: Right-sided colon cancers (RCC) and left-sided colon cancers (LCC) are of different embryological origins, and various differences exist between them. However, the survival difference has not been assessed. The aim of this meta-analysis was to quantify the prognostic differences between RCC and LCC.

Methods: Fifteen studies that compared the prognosis of colon cancer according to tumor location were identified. The effects of tumor location on survival outcome were assessed.

Results: Patients with RCC had a significantly worse prognosis than did those with LCC in overall survival (OS) (hazard ratio (HR) = 1.14, 95 % confidence interval (CI) 1.06-1.22, p < 0.01). Our subgroup analyses demonstrated significant prognostic differences in Western countries (HR = 1.15, 95 % CI 1.08-1.23, p < 0.01), a nationwide database (HR = 1.15, 95 % CI 1.05-1.27, p = 0.01), and a stage-adjusted analysis (HR = 1.14, 95 % CI 1.05-1.24, p < 0.01).

Conclusions: These findings demonstrate that tumor location is associated with prognosis in colorectal cancer patients, and those with RCC have a significantly worse prognosis than those with LCC in terms of OS. RCC should be treated distinctively from LCC, and the establishment of standardized management for colon cancer by tumor location is needed.
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http://dx.doi.org/10.1007/s11605-015-3026-6DOI Listing
March 2016

Transanal drainage tube placement to prevent anastomotic leakage following colorectal cancer surgery with double stapling reconstruction.

Surg Today 2016 May 1;46(5):613-20. Epub 2015 Aug 1.

Department of Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.

Purpose: Anastomotic leakage (AL) is a critical complication of colorectal cancer surgery. The transanal drainage tube (TDT) is designed to prevent AL caused by decompression and stasis at the anastomosis. We conducted this study to investigate the feasibility of using the TDT to prevent AL following double-stapling technique reconstruction (DST).

Methods: The subjects of this study were 179 patients who underwent curative resection and DST reconstruction for sigmoid colon and rectal cancer in our institution between 2008 and 2013. We analyzed the effectiveness of the TDT for preventing AL.

Results: A TDT was placed in 78 patients (43.6 %, TDT group) and not placed in the remaining 101 patients (56.4 %, NTDT group). AL developed in 2 (2.6 %) patients from the TDT group and in 14 (13.9 %) patients from the NTDT group (p = 0.009). Univariate analysis revealed that AL was significantly correlated with tumor distance from the anal verge (AV), the number of staples, and TDT placement. Multivariate analysis revealed a significantly positive correlation between AL and AV [OR 0.877 (0.783-0.982) p = 0.023] and a significantly negative correlation between AL and TDT placement [OR 0.07 (0.013-0.374) p = 0.002].

Conclusions: Anastomotic decompression with TDT placement may prevent AL after colorectal cancer surgery with DST reconstruction.
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http://dx.doi.org/10.1007/s00595-015-1230-3DOI Listing
May 2016

Self-Expanding Metallic Stents Versus Surgical Intervention as Palliative Therapy for Obstructive Colorectal Cancer: A Meta-analysis.

World J Surg 2015 Aug;39(8):2037-44

Department of Surgery, Keio University School of Medicine, 35 Shinanotmachi, Shinjuku-ku, Tokyo, Japan,

Background: Although self-expanding metallic stents (SEMS) are useful tools for relieving large bowel obstructions in patients with colorectal cancer (CRC), their efficacy in a palliative setting has not been validated. This meta-analysis aimed to evaluate the feasibility of SEMS as a palliation for unresectable CRC patients with bowel obstructions and to determine their contribution to the prognosis of CRC, compared with surgical intervention.

Methods: We conducted a literature search of the PubMed and Cochrane Library databases. We selected all controlled trials that compared SEMS with surgical interventions as palliative treatments in unresectable obstructive CRC patients. The primary outcome was early complications, and the secondary outcomes were mortality, other morbidities, and long-term survival rates.

Results: Ten studies met our inclusion criteria. SEMS significantly reduced the risk of early complications (odds ratio [OR] 0.34; 95% confidence interval [CI] 0.20-0.58%; P<0.01), mortality (OR 0.31; 95% CI 0.15%-0.64%; P<0.01), and stoma creation (OR 0.19; 95% CI 0.12-0.28%; P<0.01). Although SEMS placement was significantly associated with a higher risk of perforation of the large bowel (OR 5.25 95% CI 2.00-13.78%; P<0.01) and late complications (OR 1.94; 95% CI 0.90-4.19%; P=0.03), it also contributed significantly to better long-term survival (hazard ratio 0.46; 95% CI 0.31-0.68%; P<0.01).

Conclusions: Compared with surgical intervention, SEMS could provide feasible palliation for patients with bowel obstructions and unresectable CRC, because of their acceptable morbidity rates and better patient prognoses.
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http://dx.doi.org/10.1007/s00268-015-3068-7DOI Listing
August 2015
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