リンパ節転移を伴った微小直腸カルチノイドの1例

概要

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The patient was a 47-year-old woman complaining of bloody stool. Digital examination revealed a hard, pea-sized tumor of the rectum and two hard lesions outside the rectal wall. Laboratory examination showed no abnormalities. The amount of serotonin in the blood and excretion of 5-HIAA into the urine were within normal limits. Barium enema and colonoscopy showed a sessile yellow lesion with a smooth surface 6 cm from the anal nargin. The biopsy specimen showed the the lesion to be a carcinoid tumor. Low anterior resection was performed, because of the posibility of rnetastasis to the regional lymph nodes. The resected specimen contained a small elevated lesion measuring 8×6mm.<BR>Although the carcinoid tumor was limited to within the submucosal layer, it showed vascular invasion, and metastases to 4 regional lymph nodes were proved.