Peripilar keratin casts are characterized by asymptomatic, minute, semifirm, tannish, discrete, freely movable, cylindrical masses, distributed along the scalp hairs. M. J. Brunner and J. M. Facq described the condition as "A Pseudoparasite of the Scalp Hair"1 and A. M. Kligman, as "Hair Cases"2 in the same issue of the A. M. A. Archives of Dermatology, in April, 1957. None of the authors could locate an identical case description.
Report of Cases
In June, 1958, I examined three Caucasian sisters, aged 4, 6, and 7 years. All had numerous, barely visible, tannish nodules on their hair shafts. These lesions were asymptomatic and had been noticed simultaneously in all three children approximately three months previously. The only feasible etiological agent elicited was the application of a certain brand of hair spray on several occasions prior to the onset of the disorder. Grossly, the lesions were tan, varying
SCOTT MJ. Peripilar Keratin Casts. AMA Arch Derm. 1959;79(6):654–655. doi:10.1001/archderm.1959.01560180028009
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