Microscopic description Atypical squamous cells exhibiting enlarged nuclei (>3x normal intermediate squamous cells), irregular nuclear membrane contours, hyperchromasia and perinuclear halo (koilocytic changes). Interpretation Low grade Squamous Intraepithelial Lesion (LSIL) Credit Abdulaziz Assiri, MSc, CT(ASCPi)HTL Aisha Althenian, MSc, CT(ASCP)