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sessile serrated adenoma
In gastroenterology, a sessile serrated adenoma (abbreviated SSA), also known as sessile serrated polyp (abbreviated SSP), is a premalignant flat (or sessile) lesion of the colon, predominantly seen in the cecum and ascending colon.
SSAs are thought to lead to colorectal cancer through the (alternate) ''serrated pathway''. This differs from most colorectal cancer, which arises from mutations starting with inactivation of the APC gene.
Multiple SSAs may be part of the ''serrated polyposis syndrome''.
==Symptoms==
SSAs, generally, are asymptomatic. They are typically identified on a colonoscopy and excised for a definitive diagnosis and treatment.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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