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Journal of the American Academy of Dermatology
Volume 46, n° 2
pages 264-270 (février 2002)
Doi : 10.1067/mjd.2002.119650
Myxoid melanoma: Immunohistochemical studies and a review of the literature

Purvisha Patel, BA a, Kimberly Levin, MD a, Karen Waltz, MD b, Klaus F. Helm, MD a
a Division of Dermatology, Milton S. Hershey Medical Center of Penn State University Hershey, Pennsylvania 
b in private dermatology practice. Hershey, Pennsylvania 


Malignant myxoid melanoma (MMM) is a rarely reported variant of malignant melanoma, which can often be confused with other mucin-containing neoplasms. A retrospective study of 3 cases of MMM and a review of the English-language literature was performed. MMM affects an older population and is frequently misdiagnosed. The major pathologic features are atypical spindle cells embedded in a myxoid stroma. Immunohistochemistry analysis of the tumor shows uniform staining of the spindle cells with S-100. In our 3 cases, there were noticeably more mast cells that could be detected with Giemsa stain and with antibody against transforming growth factor. The prognosis appears to be equivalent to other primary melanomas. Diagnosing MMM requires a high index of suspicion. We hypothesize that mast cells and secretion of transforming growth factor β stimulates fibroblast secretion of mucin, which contributes to the tumor's invasive potential. (J Am Acad Dermatol 2002;46:264-70.)

The full text of this article is available in PDF format.

 Reprint requests: Klaus Helm, MD, Division of Dermatology, Hershey Medical Center, Hershey, PA 17033.

© 2002  American Academy of Dermatology, Inc. Published by Elsevier Masson SAS@@#104157@@
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