Case 1: A 62-year-old man was urgently admitted to our hospital because of left lower abdominal pain. Abdominal CT showed gastric perforation and we performed omental patch repair emergently. Postoperative upper gastrointestinal endoscope revealed an ulcerative lesion in the lesser curve of upper area of gastric body, which proved to be a poorly differentiated adenocarcinoma by biopsy. Thus, we performed total gastrectomy with D2 lymph node dissection. Resected specimen revealed type 2 gastric cancer in the perforated area. Pathological stage was pT3pN0M0, pStage ⅡA. Adjuvant chemotherapy by S-1 was performed and he is alive without tumor recurrence 12 months after the first operation. Case 2: A 71-year- old man was urgently admitted to our hospital because of upper abdominal pain after dinner. Abdominal CT suggested gastric perforation and we performed emergent laparoscopic operation. Perforated lesion about 8 mm in diameter was found in the anterior wall of gastric body. After debridement, perforated lesion was closed with a running suture and additionally omental patch repair was performed. Pathologically, well-differentiated adenocarcinoma was detected in the debridement tissue, and he was diagnosed with perforated gastric cancer. Thus, we performed total gastrectomy with D2 lymph node dissection 28 days after surgery. Pathological stage was pT3pN0M0, pStage ⅡA. Adjuvant chemotherapy by CapeOX was performed and he is alive without tumor recurrence 12 months after the first operation.

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