症例
ESDにより切除し得た，dysplasiaを伴うInverted Sessile Serrated Lesionの一例
2022 年 100 巻 1 号 p. 108-110
詳細
2022 年 100 巻 1 号 p. 108-110
A 73-year-old man came to our hospital stating chief complaints of constipation and anal pain. Colonoscopy revealed a 20-mm elevated depressed lesion in the ascending colon. The pit pattern in the depressed area could not be detected by endoscopy due to mucus accumulation. The lesion was diagnosed as an inverted SSL; ESD was performed due to dysplasia, while cancer could not be ruled out.
Pathology revealed a lesion combining features of TSA and SSL, with an inverted growth pattern invading the muscularis mucosae. Dysplasia was observed in the depressed area that could not be detected.
It is essential to consider that inverted SSLs may be complicated by dysplasia or cancer and grow into the muscularis mucosae.
