Trichoscopy of Terra Firma-Forme Dermatosis of the Scalp: A Case Report

Introduction: Terra firma-forme dermatosis (TFFD) is a benign condition characterized by hyperpigmented patches that resist routine washing yet are removable with isopropyl alcohol. Observing TFFD on the scalp is an exceptional event. Case Presentation: A 9-year-old female with ectodermal dysplasia and features of diffuse alopecia areata presented with multiple brown patches on the scalp. Trichoscopic examination revealed cluster of brown dots arranged in single files forming multiple curved lines that resemble a fingerprint pattern composed of dots. The lesions were completely removed by rubbing with isopropyl alcohol-soaked gauze. Discussion: This case introduces a novel trichoscopic pattern in scalp TFFD, expanding the diagnostic spectrum of the condition. The rapid resolution with isopropyl alcohol confirms the diagnosis, underscoring the utility of trichoscopy as a noninvasive diagnostic tool in complex scalp disorders.