Publications by authors named "Kuniyuki Tsuchiya"

Background:  Primary neuroendocrine tumors of the gallbladder (GB-NETs) are rare, accounting for 0.5% of all NETs and 2.1% of all gallbladder cancers.

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An 84-year-old man on hemodialysis was referred to our department for an advanced gastric cancer with pyloric stenosis. Pre-operative CT showed thickening of the stomach wall at the primary lesion and regional lymph node metastasis, while no clear peritoneal metastasis was found. However, we found peritoneal disseminations during the operation, so gastrojejunal bypass was performed.

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In general, gastrojejunal bypass is performed for unresectable gastric cancers with stenosis. It enables patients to take food and be discharged from the hospital earlier. Previously, we used to primarily perform open gastrojejunal bypass; however, recently, we perform laparoscopic gastrojejunal bypass because it is minimally invasive.

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The patient was a 30-year-old man who underwent a medical examination for shortness of breath.An abdominal computed tomography(CT)scan revealed advanced ascending colon cancer with multiple metastases to the liver.We performed a laparoscopic right hemicolectomy first, due to the obstruction.

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We attempted S-1 administered five days a week from March, 2004 for an 84-year-old female harboring Borrmann type 1 gastric cancer because her family did not agree to her gastrectomy. After treatment for 1 month the lesion changed into a shallow ulcer. The lesion was clinically diagnosed with CR about 3 months later.

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We performed surgical resections in 6 cases of advanced gastric cancer and 4 cases of colorectal cancer after preoperatively treating them with TS-1 at a daily dose of 80-100 mg/body for 2 weeks, and evaluated whether one can estimate their sensitivity to TS-1 by a pathological examination. Case 1 of type 3 advanced gastric cancer underwent surgery after one week interval following oral administration of TS-1 at a daily dose of 80 mg/body for 2 weeks. Surprisingly, the pathological examination revealed complete disappearance of cancer cells in the resected stomach and no cancer cells in the regional lymphnodes, judged grade 3 in pathological effectiveness.

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A 68-year-old woman was admitted to our hospital because of type 4 gastric cancer associated with paraaortic lymph node metastasis. Considered surgically incurable, she was placed on preoperative chemotherapy consisting of Methotrexate (MTX) 50 mg (day 1), CDDP 10 mg (day 2-6), 5-FU 500 mg (day 1-6) and Leucovorin (LV) 60 mg (day 2-6). Because of severe nausea and leucopenia, she could receive only 1 course of the chemotherapy.

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