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| 1 | Original single-incision laparoscopic cholecystectomy for acute inflammation of the gallbladder显示文摘AIM:To investigate the safety and feasibility of our original single-incision laparoscopic cholecystectomy (SILC) for acute inflamed gallbladder (AIG).METHODS:One hundred and ten consecutive patients underwent original SILC for gallbladder disease without any selection criteria and 15 and 11 of these were diagnosed with acute cholecystitis and acute gallstone cholangitis,respectively.A retrospective review was performed not only between SILC for AIG and non-AIG,but also between SILC for AIG and traditional laparoscopic cholecystectomy (TLC) for AIG in the same period.RESULTS:Comparison between SILC for AIG and nonAIG revealed that the operative time was longer in SILC for AIG (97.5min vs 85.0min,P=0.03).The open conversion rate (2/26 vs 2/84,P=0.24) and complication rate (1/26 vs 3/84,P=1.00) showed no differences,but a need for additional trocars was more frequent in SILC for AIG (5/24 vs 3/82,P=0.01).Comparison between SILC for AIG and TLC for AIG revealed no differences based on statistical analysis.CONCLUSION:Our original SILC technique was ade-quately safe and feasible for the treatment of acute cholecystitis and acute gallstone cholangitis. | Kazunari Sasaki Goro Watanabe Masamichi Matsuda Masaji Hashimoto | 2012 | World Journal of Gastroenterology2012，18，9： | 7 |
| 2 | Liver resection for hepatocellular carcinoma using a microwave tissue coagulator: Experience of 1118 cases显示文摘A I M : To present our extensive experience of hepatectomy for hepatocellular carcinoma using a microwave tissue coagulator to demonstrate the effectiveness of this device. METHODS: A total of 1118 cases(1990-2013) were reviewed,with an emphasis on intraoperative blood loss,postoperative bile leakage and fluid/abscess formation,and adaptability to anatomical resection and hepatectomy with hilar dissection.RESULTS: The median intraoperative blood loss was 250 m L; postoperative bile leakage and fluid/abscess formation were seen in 3.0% and 3.3% of cases,respectively. Anatomical resection was performed in 275 cases,including 103 cases of hilar dissection that required application of microwave coagulation near the hepatic hilum. There was no clinically relevant biliary tract stricture or any vascular problems due to heat injury. Regarding the influence of cirrhosis on intraoperative blood loss,no significant difference was seen between cirrhotic and non-cirrhotic patients(P = 0.38),although cirrhotic patients tended to have smaller tumors and underwent less invasive operations. CONCLUSION: This study demonstrated outcomes of an extensive experience of hepatectomy using heat coagulative necrosis by microwave tissue coagulator. | Kazunari Sasaki Masamichi Matsuda Masaji Hashimoto Goro Watanabe | 2015 | World Journal of Gastroenterology2015，21，36： | 7 |
| 3 | Retroperitoneal cavernous hemangioma resected by a pylorus preserving pancreaticoduodenectomy显示文摘A retroperitoneal hemangioma is a rare disease. We report on the diagnosis and treatment of a retroperitoneal hemangioma which had uncommonly invaded into both the pancreas and duodenum, thus requiring a pylorus preserving pancreaticoduodenectomy (PpPD). A 36-year-old man presented to our hospital with abdominal pain. An enhanced computed tomography scan without contrast enhancement revealed a 12 cm × 9 cm mass between the pancreas head and right kidney. Given the high rate of malignancy associated with retroperitoneal tumors, surgical resection was performed. Intraoperatively, the tumor was inseparable from both the duodenum and pancreas and PpPD was performed due to the invasive behavior. Although malignancy was suspected, pathological diagnosis identified the tumor as a retroperitoneal cavernous hemangioma for which surgical resection was the proper diagnostic and therapeutic procedure. Reteoperitoneal cavernous hemangioma is unique in that it is typically separated from the surrounding organs. However, clinicians need to be aware of the possibility of a case, such as this, which has invaded into the surrounding organs despite its benign etiology. From this case, we recommend that combined resection of inseparable organs should be performed if the mass has invaded into other tissues due to the hazardous nature of local recurrence. In summary, this report is the first to describe a case of retroperitoneal hemangioma that had uniquely invaded into surrounding organs and was treated with PpPD. | Marie Hanaoka Masaji Hashimoto Kazunari Sasaki Masamichi Matsuda Takeshi Fujii Kenichi Ohashi Goro Watanabe | 2013 | World Journal of Gastroenterology2013，19，28： | 2 |
| 4 | A specific gene-expression signature quantifies the degree of hepatic fibrosis in patients with chronic liver disease显示文摘AIM: To study a more accurate quantification of hepatic fibrosis which would provide clinically useful information for monitoring the progression of chronic liver disease. METHODS: Using a cDNA microarray containing over 22 000 clones, we analyzed the gene-expression profiles of non-cancerous liver in 74 patients who underwent hepatic resection. We calculated the ratio of azan- stained: total area, and determined the morphologic fibrosis index (MFI), as a mean of 9 section-images. We used the MFI as a reference standard to evaluate our method for assessing liver fibrosis. RESULTS: We identified 39 genes that collectively showed a good correlation (r > 0.50) between gene-expression and the severity of liver fibrosis. Many of the identified genes were involved in immune responses and cell signaling. To quantify the extent of liver fibrosis, we developed a new genetic fibrosis index (GFI) based on gene-expression profiling of 4 clones using a linear support vector regression analysis. This technique, based on a supervised learning analysis, correctly quantified the various degrees of fibrosis in both 74 training samples (r = 0.76, 2.2% vs 2.8%, P < 0.0001) and 12 independent additional test samples (r = 0.75, 9.8% vs 8.6%, P < 0.005). It was far better in assessing liver fibrosis than blood markers such as prothrombin time (r = -0.53), type Ⅳ collagen 7s (r = 0.48), hyaluronic acid (r = 0.41), and aspartate aminotransferase to platelets ratio index (APRI) (r = 0.38). CONCLUSION: Our cDNA microarray-based strategy may help clinicians to precisely and objectively monitor the severity of liver fibrosis. | Tohru Utsunomiya Masahiro Okamoto Shigeki Wakiyama Masaji Hashimoto Kengo Fukuzawa Takahiro Ezaki Shinichi Aishima Yasuji Yoshikawa Taizo Hanai Hiroshi Inoue Graham F Barnard Masaki Mori | 2007 | World Journal of Gastroenterology2007，13，3： | 1 |
| 5 | Original method of transumbilical single-incision laparoscopic deroofing for liver cyst显示文摘 | Kazunari Sasaki Goro Watanabe Masamichi Matsuda Masaji Hashimoto Takashi Harano | 2010 | Journal of Hepato-Biliary-Pancreatic Sciences2010，，： | 1 |
| 6 | Concomitant Duodenal and Pancreatic Metastases from Renal Cell Carcinoma: Report of a Case显示文摘 | Masaji Hashimoto Yasuhiko Miura Masamichi Matsuda Goro Watanabe | 2001 | Surgery Today2001，，2： | 1 |
| 7 | Right hepatectomy for giant cavernous hemangioma with diffuse hemangiomatosis around Glisson's capsule显示文摘Diffuse liver hemangiomatosis with giant cavernous hemangioma in adult is extremely rare. A 35 year-old woman presented to hospital with main complaint of epigastric pain and abdominal fullness. An enhanced computed tomography scan revealed a massive liver tumor in right lobe about 150 mm in size. There was contrast enhancement at the periphery of the mass consistent with a cavernous hemangioma. She underwent right hepatectomy. Histologically, it was diagnosed as a cavernous hemangioma. And also, hemangiomatous lesions were scattered around the Glisson's capsule on the back ground liver. These hemangiomatous lesions were not recognized preoperatively. Even if we couldn't diagnose hemangiomatosis around the main giant hemangioma preoperatively, we need to take enough surgical margins because the giant hemangioma has the potential to have small hemangiomatous lesions around the tumor. We reported right hepatectomy for giant cavern-ous hemangioma with diffuse hepatic hemangiomatosis without an extrahepatic lesion in an adult. | Yu Ohkura Masaji Hashimoto Seigi Lee Kazunari Sasaki Masamichi Matsuda Goro Watanabe | 2014 | World Journal of Gastroenterology2014，20，25： | 1 |
| 8 | Surgical approach for hepatitis C virus-related hepatocellular carcinoma显示文摘Hepatitis C is a strong prognostic factor for patients with hepatocellular carcinoma(HCC). Although liver resection and liver transplantation offer the chance of a cure for HCC,adequate management of co-existing infection with hepatitis C virus(HCV) is important to enable better long-term outcomes after surgery for HCV-related HCC. For patients undergoing liver resection,perioperative anti-viral treatment is recommended,since a decreased HCV viral load itself is reportedly associated with a lower tumor recurrence rate and a longer overall survival. For patients undergoing transplanatations for HCC complicated by end-stage liver disease,the post-transplant management of HCV infection is also necessary to prevent progressive graft injury caused by active hepatitis under the immunosuppressive condition that is needed after liver transplantation. Although only a few lines of solid evidence are available for postoperative antiviral treatment because of the limited indication and frequent adverse events caused by conventional high-dose combination interferon therapy,new direct acting anti-viral agents would enable interferon-free anti-viral treatment with a higher virologic response and minimal side effects. | Junichi Shindoh Masaji Hashimoto Goro Watanabe | 2015 | World Journal of Hepatology2015，7，1： | 1 |
| 9 | Primary hepatic neuroendocrine neoplasm diagnosed by somatostatin receptor scintigraphy:A case report显示文摘BACKGROUND Primary hepatic neuroendocrine neoplasm(NEN)is a rare condition,and it is difficult to differentiate between primary and metastatic hepatic NENs.Herein,we report a case of primary hepatic NEN that initially mimicked a hemangioma but showed a gradual increase in size on long-term careful observation.CASE SUMMARY A 47-year-old woman was incidentally diagnosed with a 12-mm liver mass,suspected to be a hemangioma.Since then,regular follow-up had been carried out.Ten years later,she was referred to our institute due to the tumor(located in segment 4)having increased to 20 mm.Several imaging studies depicted no apparent extrahepatic lesion.Positron emission tomography(PET)/computed tomography exhibited significant accumulation in the mass lesion,which made us consider the possibility of malignancy.Left hepatectomy was performed.The histopathological diagnosis was neuroendocrine tumor grade 2,with somatostatin receptor 2 a/5 positivity.Postoperative somatostatin receptor scintigraphy(SRS)showed no other site,leading to the diagnosis of NEN of primary hepatic origin.The gradual growth of the hepatic NEN over 10 years suggested that it was likely to be a primary liver tumor.CONCLUSION In this case,positivity on PET and postoperative SRS may have helped determine whether the tumor was primary or metastatic. | Miho Akabane Yuta Kobayashi Keiichi Kinowaki Satoshi Okubo Junichi Shindoh Masaji Hashimoto | 2022 | World Journal of Clinical Cases2022，10，7： | 0 |
| 10 | Solid pseudopapillary neoplasm of the pancreas in a young male with main pancreatic duct dilatation: A case report显示文摘BACKGROUND Solid pseudopapillary neoplasms(SPNs)are rare tumors of the pancreas.Typically,they occur in young females,often have characteristic imaging features,such as cystic components and calcification,and have few effects on the pancreatic duct.CASE SUMMARY A 31-year-old man was admitted to our hospital with the chief complaint of epigastric pain.There was only mild tenderness in his upper abdomen,and blood tests showed only a slight increase in alkaline phosphatase.Contrast-enhanced computed tomography showed a 40-mm-diameter,hypovascular mass in the head of the pancreas,and the main pancreatic duct upstream of the mass was severely dilated.Magnetic resonance imaging showed low intensity on T1-weighted images,with high intensity on T2-weighted image in some parts.Pancreatic ductal adenocarcinoma was the primary differential diagnosis.Portal vein infiltration could not be ruled out,so this case was a candidate for neoadjuvant chemotherapy.Subsequently,endoscopic ultrasound-guided fine needle aspiration was performed,and pathological evaluation and immunostaining suggested a diagnosis of SPN.Thus,pancreatoduodenectomy was performed.One year after the operation,the patient is alive with no recurrence.CONCLUSION Main pancreatic duct dilatation is usually a finding of suspected pancreatic cancer.However,pancreatic duct dilatation can occur in SPN depending on the location and growth speed.Therefore,SPN should be considered in the differential diagnosis of tumors with pancreatic duct dilatation,and pathological evaluation by endoscopic ultrasound-guided fine needle aspiration should be actively performed. | Saki Nakashima Yoshiki Sato Tsunao Imamura Daisuke Hattori Tetsuo Tamura Rikako Koyama Junichiro Sato Yuta Kobayashi Masaji Hashimoto | 2021 | World Journal of Clinical Cases2021，9，36： | 0 |
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