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  Vol. 142 No. 2, February 2006 TABLE OF CONTENTS
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Filiform Horny Projections on the Palms of a 69-Year-Old Man—Diagnosis

Arch Dermatol. 2006;142:235-240.

Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Filiform hyperkeratosis (minute digitate hyperkeratosis) of the palms.

MICROSCOPIC FINDINGS AND CLINICAL COURSE

A skin biopsy specimen revealed that each horny projection was composed of a single, well-defined, compact, parakeratotic column without evidence of dyskeratosis, acantholysis, cytologic atypia, or vacuolation of keratinocytes in the underlying epidermis. The parakeratotic column arose directly from the granular layer, which appeared thinned at this area. Neither continuity of the keratotic lesions with the acrosyringium nor an underlying dermal eccrine duct was present. The dermis was unremarkable. Based on the clinical and histopathologic findings, a diagnosis of filiform hyperkeratosis of the palms was made, and keratolytic creams were prescribed, with little improvement of the lesions.

DISCUSSION

Filiform hyperkeratosis is a rare disorder of keratinization of unclear etiology. Clinically, it is characterized by the presence of multiple keratotic projections that affect the palms and usually the soles as well.1-6 Histopathologically, columns of parakeratosis or orthokeratosis have been reported in cases of filiform hyperkeratosis.1-2,5-6 Whether cases with orthokeratosis and cases with . . . [Full Text of this Article]


RELATED ARTICLE

Filiform Horny Projections on the Palms of a 69-Year-Old Man—Quiz Case
Mar Blanes, Fernando Carnicer, Rafael Botella, Natalia Pastor, and Francisca M. Peiró
Arch Dermatol. 2006;142(2):235-240.
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