Introital adenosis associated with Stevens-Johnson syndrome

A 23-year-old woman presented with vulvar pain and dyspareunia 1.5 years after a Stevens-Johnson syndrome. A red friable lesion was identified at the vestibule and lower third of the vagina. The histologic diagnosis was adenosis with a tubal glandular epithelium. The possible histogenesis of this lesion is discussed with a review of the embryology of the lower genital tract.