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An 84-year-old male was admitted to a local clinic suffering from general fatigue with associated anemia, and therefore was referred to our hospital. His medical history included a proximal gastrectomy with the formation of a jejunal pouch as a reconstructive treatment for early upper gastric cancer at 78 years of age (6 years prior). A type 2 tumor located in the jejunal pouch almost completely surrounded by small intestinal mucosa was demonstrated by gastrointestinal endoscopy. The biopsy specimens showed a moderately differentiated tubular adenocarcinoma. Computed tomography showed no lymphadenopathy or hepatic metastases. A resection of the residual stomach and jejunal pouch was performed. Based on the histological findings from the resected specimen, the tumor was considered to be primary adenocarcinoma in the jejunal pouch. The postoperative course was uneventful, and the patient has shown no evidence of any recurrence during the 6-year period after the most recent surgery. [ABSTRACT FROM AUTHOR]

50-year-old woman was admitted to our hospital because of abdominal distension and fullness. Computed tomography and magnetic resonance imaging showed bilateral ovarian tumors. Although these ovarian tumors were suspected of being metastatic, the primary tumor site could not be detected before the bilateral salpingo-oophorectomy. At the time of laparotomy, there was no apparent peritoneal dissemination or ascites. The pathological findings suggested that the ovarian tumors were metastases from cancer of the digestive tract. Positron emission tomography using F-fluorodeoxyglucose positron emission tomography (FDG-PET) and double-balloon enteroscopy detected jejunal cancer. A second laparotomy for the resection of jejunal cancer was performed. The patient received adjuvant chemotherapy, and there has not been any recurrence for 24 months since the resection was performed. In conclusion, FDG-PET was found to play a valuable role in the detection of the primary tumor. Intensive chemotherapy and surgical treatment also contributed to the long-term survival of the patient. [ABSTRACT FROM AUTHOR]