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Ulcerated Storiform Collagenoma

This rare form of benign fibrous tumor can be associated with Cowden's disease. An important differential diagnosis of any fibromatous lesion showing a whorled storiform architecture with neutrophils would be a chronic leukocytoclastic vasculitis, namely erythema elevatum diutinum. One must also be cognizant of a sclerosing perineurioma.

Weill Cornell Medicine Dermatopathology 1300 York Avenue
Room F-309
Box #58
New York, NY 10065 Phone: (212) 746-6434