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May 1953

KERATOSIS OBTURANS OTICA: Obstructive Hollow Keratotic Cast of External Auditory Canal

AMA Arch Derm Syphilol. 1953;67(5):516-517. doi:10.1001/archderm.1953.01540050080021

This is a report of a rare condition observed in a patient in private practice which should be interesting to the otologist as well as to the dermatologist. We can find no previous record of an identical case in the dermatologic texts or literature.


The patient, M. O'R., a 38-year-old unmarried Irish-American woman, first noted itching and fullness in her left external auditory canal in July, 1948. At the end of three weeks the feeling of obstruction and pruritus in her left ear became unbearable. It was accompanied by headache and loss of hearing on the left side. The discomfort was not relieved until an exact cast in the form of a hollow mold of her external auditory canal was removed. The entire process continued in the left external auditory canal about every three to four weeks. The obstructive mold of keratin had to be removed.

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