Cutaneous intravascular papillary endothelial hyperplasia: a benign lesion that may simulate angiosarcoma.

An example of intravascular papillary endothelial hyperplasia (Masson's pseudoangiosarcoma) of the skin of the forearm is presented. The clinical and pathologic features of the unusual lesion are described. Its benign, self-limited nature is emphasized, despite histopathologic features which may suggest the diagnosis of angiosarcoma. Appropriate therapy should therefore be directed to local excision rather than radical surgery.