Atypical presentation of a vaginal epithelial inclusion cyst

Vaginal masses can have numerous different presentations and causes. Physicians can often make an empiric diagnosis of these masses on the basis of their clinical presentation and location. Most of these diagnoses are correct, with the rare exception of the occasional urethral diverticulum or hydrocele. In this case report, we discuss the initial diagnosis of a suspected infected Bartholin gland duct cyst that was in fact a 10 × 8 × 7.5-cm epithelial inclusion cyst that extended through the ischiorectal fossa and down to the gluteal region, requiring extensive dissection. Also presented is a detailed description of the anatomical landmarks encountered at dissection through the vaginal sidewall and ischiorectal fossa.