Feathering! Adenocarcinoma in situ. The feathering noted at the edge of the glandular fragments and clear polarity of the cells strongly favors endocervical over endometrial origin. ASC-H and HSIL involving glands are certainly in the cytologic differential but the described features are more suggestive of a glandular lesion. HSIL in glands classically has flattened, rounded edges rather than feathering.