SESSILE SERRATED POLYP (AKA SESSILE SERRATED ADENOMA)

red square points out  basal dilation of the crypts, 

red square  basal dilation of the crypts, and crypts that run horizontal to the basement membrane (horizontal crypts.

red square show basal crypt serration and  crypt branching

HISTOLOGICAL FINDINGS OF  SESSILE SERRATED POLYP
1.-Serrated architecture with basal dilation of the crypts and basal crypt serration,  
2.- crypts that run horizontal to the basement membrane (horizontal crypts),
3.- crypt branching.
4.- Lack of nuclear dysplasia