Skip Navigation LinksHome > February 2002 - Volume 24 - Issue 1 > CD34-Reactive Myxoid Dermal Dendrocytoma
American Journal of Dermatopathology:
Extraordinary Case Reports

CD34-Reactive Myxoid Dermal Dendrocytoma

Ohata, Chika M.D.; Kawahara, Kunimitsu M.D., Ph.D.

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Abstract

Normal skin is composed in part of cells that express CD34. These include periadnexal spindle cells, vascular endothelial cells, and interstitial dendritic cells. We report on a tumor composed mainly of CD34-reactive spindle cells. A 66-year-old Japanese woman presented with a skin-colored, dome-shaped, cutaneous papule on her left palm that was 7 mm in diameter and had developed within the preceding 3 months. Light microscopic examination showed a well-circumscribed polypoid tumor consisting of spindle-shaped cells and thin collagen fibers arranged loosely in a fascicular pattern within a myxoid matrix. Immunohistochemically, most of the tumor cells stained strongly for CD34, but did not stain with antibodies to S-100 protein, smooth muscle actin, desmin, neuron-specific enolase, epithelial membrane antigen, or factor XIIIa. Staining for vimentin and CD68 was positive. We believe this lesion to be a CD34-reactive myxoid dermal dendrocytoma of a type that has not been described previously.

© 2002 Lippincott Williams & Wilkins, Inc.

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