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First page of 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 alopecia areata incognita 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 non-invasive diagnostic tool in complex scalp disorders.

Journal Section:
Novel Insights from Clinical Practice
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S. Karger AG, Basel
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2025
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