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September 1997

Hair Loss in a 5-Year-Old Boy

Author Affiliations

The Johns Hopkins University School of Medicine, Baltimore, Md

Arch Dermatol. 1997;133(9):1163-1164. doi:10.1001/archderm.1997.03890450113016

REPORT OF A CASE  A 5-year-old white boy was referred for evaluation of a solitary patch of hair loss, which had begun 8 weeks earlier. Initially, he had presented to his primary care physician with an inflamed plaque of alopecia involving the left frontal area. He was treated with oral antibiotics, with minimal response. Owing to persistence of the lesion, the patient was referred for further evaluation and treatment. On examination, a 3×3-cm, erythematous, crusted, scaling patch with broken hairs was present on the front part of the scalp (Figure 1). Purulent drainage and follicular pustules were absent. The social history was significant for 2 healthy cats and 1 dog at home. Wood light fluorescence was absent. A potassium hydroxide preparation of scrapings from the involved scalp and hairs was nondiagnostic. A fungal culture of broken hairs and scale showed some growth in 5 days. A mature colony plated on