Fig. 6
From: Inflammatory and infectious manifestations of immunodeficiency in the gastrointestinal tract

Biopsy samples from an anal ulcer reveal multinucleated squamous epithelial cells with marginated chromatin and nuclear inclusions typical of Herpes Simplex Virus a. Immunostains are confirmatory and can help distinguish HSV from VZV infection b. (Hematoxylin and eosin a HSV immunostain b; original magnification: × 400 a, b)