what is sessile serrated adenoma
Sessile serrated adenoma. Sessile serrated adenoma, abbreviated SSA, is a premalignant polyp of the large bowel. It is also known as sessile serrated polyp (abbreviated SSP), sessile serrated lesion and sessile serrated adenoma/polyp (abbreviated SSA/P). This lesion should not be confused with the traditional serrated adenoma, previously known as serrated adenoma. 1 General.