Multiple inverted follicular keratoses as a presenting sign of Cowden's syndrome: case report with human papillomavirus studies.

Abstract excerpt

Inverted follicular keratosis is characterized by a squamous epithelial expansion of the infundibular portion of the hair follicle in an exophytic and endophytic pattern. The lesion is often associated with squamous eddies similar to an irritated keratosis and may have a superficial papillomatous architecture. The lesion most often arises as a solitary nodule on the face of middle age to elderly individuals....

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