Extragenital Lichen Sclerosus et Atrophicus

Area of Science:

• Dermatology
• Pathology

Background:

• Lichen sclerosus et atrophicus (LSA) is a chronic inflammatory skin condition.
• While typically affecting the anogenital area, LSA can present extragenitally, commonly on the neck, shoulders, and upper trunk.
• Linear lesions are an uncommon presentation of LSA.

Purpose of the Study:

• To report a unique case of linear extragenital LSA.
• To describe an atypical clinical presentation of LSA mimicking morphea.
• To emphasize the importance of histopathological confirmation in diagnosing unusual LSA cases.

Main Methods:

• Case report of a postmenopausal woman with LSA.
• Clinical examination of forehead, scalp, and back lesions.
• Histopathological analysis of skin biopsies.

Main Results:

• The patient presented with linear extragenital LSA on the forehead and scalp.
• Grouped white papules of LSA were observed on the back.
• Facial LSA mimicked morphea ('en coup de sabre') clinically.
• Histopathology confirmed LSA diagnosis.

Conclusions:

• Lichen sclerosus et atrophicus can present with rare linear extragenital lesions.
• Atypical presentations of LSA, including facial involvement mimicking morphea, can occur.
• Histopathological examination is crucial for accurate diagnosis of unusual LSA cases.