Vestibulovaginal Sclerosis Versus Lichen Sclerosus

Area of Science:

• Gynecologic Pathology
• Dermatopathology

Background:

• Lichen sclerosus (LS) is a chronic inflammatory skin condition affecting the vulva and vagina.
• Vestibulovaginal sclerosis is a condition characterized by abnormal subepithelial collagen in the vulvar vestibule and vagina.

Purpose of the Study:

• To investigate whether vestibulovaginal sclerosis and lichen sclerosus represent distinct clinical and histopathological entities.
• To differentiate between LS and vestibulovaginal sclerosis based on biopsy findings.

Main Methods:

• Retrospective review of 15 biopsies from the vagina or vulvar vestibule with abnormal subepithelial collagen.
• Categorization of cases as LS or vestibulovaginal sclerosis based on basal layer degeneration and lymphocytic infiltrate.
• Analysis of clinical data including biopsy site, patient history, and presence of vulvar LS.

Main Results:

• Nine cases were classified as LS, characterized by lymphocytic infiltrate and basal layer degeneration; 80% had co-existing vulvar LS.
• Six cases were classified as vestibulovaginal sclerosis, showing minimal inflammation and normal epithelium; none had vulvar LS.
• Histopathological differences were observed, with LS cases exhibiting more significant inflammation and epithelial changes.

Conclusions:

• Vestibulovaginal sclerosis and lichen sclerosus are clinically and histopathologically distinguishable.
• Further studies are required to ascertain if vestibulovaginal sclerosis is a subset of LS or a separate condition.