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KMID : 0356720070230010065
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Journal of the Korean Society of Coloproctology
2007 Volume.23 No. 1 p.65 ~ p.67
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Carcinoid Tumor Arising within a Tailgut Cyst -A Case Report-
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Lee Chul-Min
Lee Seung-Hyun
Jeon Chang-Wan
Ahn Byung-Kwon
Baek Sung-Uhn
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Abstract
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Tailgut cysts are rare congenital lesions. They are believed to develop from remnants of the embryonic hindgut. Malignancy in tailgut cyst is extremely unusual. We experienced a case of a carcinoid tumor arising within a tailgut cyst at the presacral space. A 40-year-old woman was admitted for acute anal pain. Digital rectal examination revealed a 2-cm-sized submucosal tumor in the posterior midline rectum 4 cm above the anal verge. On sigmoidoscopic examination, the overlying rectal mucosa seemed to be intact. We performed a transanal incisional biopsy. The pathological diagnosis of the tumor biopsy revealed a malignant neuroendocrine tumor. The patient underwent an abdominoperineal resection. The tumor proved to be mutilocular cysts with a solid component. The cysts were diagnosed as tailgut cysts that were lined by a variety of epithelial types, including inner columnar cells, outer cuboidal cells, and transitional cells. The solid component in the cysts was confirmed as a carcinoid tumor on microscopic examination. Six months after the operation, she was found to have liver and brain metastases. J Korean Soc Coloproctol 2007;23:65-67
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KEYWORD
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Tailgut cyst, Carcinoid
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