[Rectal Mucinous Cancer with Submucosal Tumor-Like Morphology Preoperatively Diagnosed Using EUS-FNAB - A Case Report].

Tomoko Matsumoto,Shiho Kuriyama, Yasuyuki Ohtawa, Toshihiko Waku

Gan to kagaku ryoho. Cancer & chemotherapy(2018)

Cited 23|Views1
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Abstract
A man in his 70s presented with a chiefcomplaint ofbleeding during bowel movements. Subsequent colonoscopy revealed a submucosal tumor-like elevated lesion ofapproximately 4 cm situated in the sigmoid section ofthe rectum. EUS-FNAB was performed, and the lesion was identified as mucinous cancer. Based on a diagnosis of rectal cancer(cT4a, cN0, cM0, cStage II), a low anterior resection was performed. Histopathological analysis of the resected specimen revealed a well-differentiated mucinous cancer. The tumor had ruptured the proper muscular layer and was developing in a submucosal tumor-like manner, protruding from the wall within a fibrous capsule. In Japan, only 15 cases of submucosal tumor-like colorectal mucinous cancer have been reported to date. It is rare for such cases to be preoperatively diagnosed as mucinous cancer using EUS-FNAB and then to undergo radical resection.
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Key words
rectal mucinous cancer,tumor-like,eus-fnab
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