Lichen Simplex Chronicus on the Scalp: Broom Fibers on Dermoscopy; Gear Wheel Sign and Hamburger Sign on Histopathology

The document discussed two cases of lichen simplex chronicus (LSC) on the scalp, characterized by localized hair loss and severe itching. Dermoscopic examination revealed broom hair fibers, while histopathological findings included the gear wheel sign and the hamburger sign, indicating hair shaft splitting and reduced sebaceous gland size. The study highlighted the importance of these diagnostic features in distinguishing LSC from other conditions like trichotillomania. Emotional stress was noted as a potential trigger for LSC, and treatment options included topical corticosteroids and psychotherapy.