squamous lesionsquamous intraepithelialsquamous cell intraepithelial lesionsquamous epithelial lesionlow squamous intraepithelial lesionsquamous intraepithelial neoplasiasquamous intraepithelial dysplasiavulvar intraepithelial lesionintraepithelial lesion meaningsquamous intraepithelial cellslesion lsilsquamous vs nonsquamous