Supplementary Material for: Diffuse Lichen Planopilaris masquerading as Diffuse Alopecia Areata

Lichen planopilaris (LPP) is a primary lymphocytic cicatricial alopecia that represents a form of follicular lichen planus. We describe a case of coexisting diffuse lichen planopilaris and female pattern hair loss masquerading as diffuse alopecia areata in 32 year old female. In complex cases such as this, dermoscopy-guided vertical and horizontal biopsies from androgen sensitive and insensitive areas are helpful in increasing diagnostic yield. Prompt initiation of treatment is key to halt disease progression. Long term follow up is important as resolution of clinical signs does not always correlate with absence of disease progression.

毛发扁平苔藓（Lichen planopilaris, LPP）是一类原发性淋巴细胞性瘢痕性脱发，属于毛囊性扁平苔藓的范畴。本文报道1例32岁女性患者同时合并弥漫性毛发扁平苔藓与女性型脱发，临床表现酷似弥漫性斑秃。针对此类复杂病例，通过皮肤镜（dermoscopy）引导，从雄激素敏感及非敏感区域采集垂直与水平活检标本，有助于提升诊断检出率。及时启动治疗是阻断疾病进展的核心要点。长期随访意义重大，因为临床体征消退并不总能对应疾病进展的终止。