Type of Preparation: Conventional Magnification: Medium Interpretation: NILM: Cellular changes consistent with Herpes simplex virus Cytomorphologic Criteria: Cellular changes consistent with Herpes simplex virus. Note the intranuclear, ?Cowdry type? inclusions. Explanatory Notes: The ?ground-glass? appearance of the nuclei is due to accumulation of viral particles leading to peripheral margination of chromatin.