Masato Yoshioka

Learn More
Dedifferentiated liposarcoma of the mesentery is an extremely rare tumor. A 71-year-old man with a 2-month history of abdominal distention was admitted to our department for evaluation and treatment of an abdominal mass. Computed tomography and magnetic resonance imaging revealed an 11 × 9 cm mass lesion with fat density in the upper right abdominal cavity,(More)
Introduction. Leiomyosarcomas of vascular origin are particularly rare tumors occurring mainly in the inferior vena cava (IVC). They are malignant, slow-growing tumors with a poor prognosis. This paper reports on a rare case of surgical resection of an IVC leiomyosarcoma mimicking a hepatic tumor. Case Presentation. A 65-year-old Japanese male was admitted(More)
We describe a patient with intracystic hemorrhage from one of multiple hepatic cysts. A 66-year-old woman was admitted to Nippon Medical School Hospital because of pain in the right upper quadrant of the abdomen. The medical history included multiple hepatic cysts and angina pectoris, which had been treated with aspirin. Three weeks before presentation,(More)
CONTEXT Erlotinib is a selective epidermal growth factor receptor tyrosine kinase inhibitor used as a target therapy against non-small lung cancer and advanced pancreatic cancer. A regimen of erlotinib plus gemcitabine has been proven to prolong overall survival in the patient with advanced pancreatic cancer. In addition to common adverse effects, such as(More)
Cystic echinococcosis (CE) is a rare afferent infectious disease in Japan. This paper reports a case of a hepatic cyst being diagnosed after surgical resection. A 40-year-old Syrian male was admitted for evaluation of a hepatic cyst. Serum antibodies of echinococcosis were negative. Enhanced computed tomography of the abdomen revealed a large cystic lesion,(More)
We removed a biliary stone and the metallic stent placed two years previously in a patient with benign biliary strictures. An 80-year-old woman who had been inplanted with an expandable metallic stent (EMS) to prevent obstruction by a large common bile duct stone about two years before as an emergency measure in another hospital, was afficted with acute(More)
A 51-year-old female had been diagnosed with a hemangioma in the hepatic segment 6 (S6). After a 6-year follow-up, enlargement of the tumor was detected. The tumor was clearly enhanced in the arterial phase, and the enhancement remained in the portal phase on computed tomography (CT). Although the primary differential diagnosis on CT was hepatocellular(More)
Positron emission tomography with 2-deoxy-2-[(18)F]fluoro-D-glucose (FDG-PET) has been proven useful for differentiating pancreatic ductal cancer from mass-forming chronic pancreatitis. However, there are particular pancreatic tumors having various grades of malignancy such as intraductal papillary mucinous neoplasm (IPMN) or pancreatic neuroendocrine(More)
  • 1