虫垂原発印環細胞癌の２例

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  • TWO CASES OF PRIMARY SIGNET RING CELL CARCINOMA OF THE VERMIFORM APPENDIX

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Primary carcinoma, especially signet ring cell carcinoma, of the vermiform appendix is rare and to diagnose the disease is difficult preoperatively. We experienced two cases of primary signet ring cell carcinoma of the vermiform appendix which were diagnosed postoperatively. Patient 1, a 73-year-old man complaing of right lower abdominal pain, underwent appendectomy under a diagnosis of acute appendicitis. Postoperative histological examination revealed signet ring cell carcinoma of the vermiform appendix. We performed an ileocecal resection with lymph node dissection. No lymph node metastasis or peritorinal dissemination was recognized. He has been well without symptoms, as of 5 years after the operation. Patient 2 was a 72-year-old man undergone an appendectomy under a diagnosis of perforated acute appendicitis. Histological examination revealed signet ring cell carcinoma of the vermiform appendix. Instead of surgery chemotherapy was started, but the therapy could not be continued due to his physical condition. He has shown no signs of recurrence or metastasis for 18 months after the operation. To avoid overlooking appendiceal carcinomas, careful intraoperative observation and postoperative pathological examination are very important.

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