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August 1981

Demodectic Mite on an Extremity

Author Affiliations


Arch Dermatol. 1981;117(8):452. doi:10.1001/archderm.1981.01650080004004

To the Editor.—  Demodectic mites have been known to be present in human hair follicles for more than 130 years. In humans, two species of the genus Demodex can be found.1 The larger, D folliculorum, resides in the hair follicle at the level of the infundibulum, while D brevis is found in the sebaceous gland proper.1 The distribution of these mites remains relatively unexplored. They are most frequently found on the face but have also been recovered from the ear canal, scalp, neck, back, chest, nipples, buttocks, and penis.2 A survey of the literature failed to disclose the description of a demodectic mite on the leg. We report the findings of such a mite.

Report of a Case.—  In April 1980, a 69-year-old woman with a ten-year history of bilateral idiopathic lymphedema came to us for examination. Numerous firm, red papules of approximately 0.5 cm in diameter had

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