RECTAL CARCINOID TUMOR 12mm IN DIAMETER, WITH METASTASIS TO THE INTERNAL ILIAC LYMPH NODES-A CASE REPORT-

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  • 内腸骨リンパ節のみに転移を伴った径１２ｍｍの直腸カルチノイドの１例

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We report a case of a rectal carcinoid tumor, 12 mm in diameter, with metastasis to the right internal iliac lymph nodes. A 46-year-old man was found to have fecal occult blood. Colonoscopic examination revealed a small tumor, 12 mm in diameter, in the lower rectum. On histopathology of a biopsied specimen, a rectal carcinoid tumor was diagnosed. Abdominal computed tomography demonstrated two swollen lymph nodes in the right internal iliac region. A super low anterior resection, with regional lymph node dissection was done. On histopathology, a rectal carcinoid in the lower rectum and metastasis to the right internal iliac lymph nodes without metastasis to the pararectal lymph nodes were diagnosed. No evidence of local recurrence or metastasis has been found during 4 years of follow-up. Regional lymph node involvement has to be evaluated even for small rectal carcinoid lesions prior to surgery. In cases of rectal carcinoid with possible lymph node metastasis, surgical resection and regional lymph node dissection are required.

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