Flat Condyloma (VIN1)

D efinition —Flat condyloma is defined as a macular variant of condyloma that falls within the category of low-grade squamous intraepithelial lesion (LSIL) and displays an identical distribution of atypia as its exophytic counterpart. In contrast to exophytic condylomas, these flat lesions are more likely to be associated with high-risk human papillomavirus (HPV) types, although the majority do not contain HPV 16 and the regression rate is presumably high. Another term for these lesions has been “VIN1,” although this term is somewhat problematic. Currently they are under the category of LSILs of the vulva, similar to exophytic condylomas and their variants.