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A Case for Diagnosis (Trichotillomania? Pseudo-Ectothrix?). Presented by Dr. Eugene F. Traub.
F. X., a girl aged 9 years, a private patient, was first observed to have a small bald spot on the scalp about eighteen months ago. A physician made a diagnosis of alopecia areata. The hair returned after local treatment was applied, but bald spots continued to form, and a dermatologist made a diagnosis of tinea capitis. Examination of the hairs, however, failed to reveal fungi. The only features noted were a peculiar constriction of the hairs near the bulb and the presence of tiny filamentous bands about the hairs just above the bulb. These bands were present on all the hairs examined, and their appearance recalled the condition described by Knowles and his co-workers as pseudo-ectothrix (Arch. Dermat. & Syph. 31:38 [Jan.] 1935). The patients observed by these authors had a neurodermatitis about the nape of the
Traub EF, Rulison RH. NEW YORK DERMATOLOGICAL SOCIETY. Arch Derm Syphilol. 1937;35(3):547–557. doi:10.1001/archderm.1937.01470210173021
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