Florid extravascular papillary endothelial hyperplasia (Masson's pseudoangiosarcoma) presenting as a soft-tissue sarcoma

M. R. Pins, D. I. Rosenthal, D. S. Springfield, A. F. Rosenberg

Research output: Contribution to journalArticle

108 Scopus citations


Papillary endothelial hyperplasia (also known as Masson's pseudoangiosarcoma) is a hyperplastic proliferation of endothelial cells that is usually an incidental finding within thrombosed dilated blood vessels or vascular tumors. Rare extravascular forms occur and can histologically closely mimic angiosarcoma. We report a case of extravascular papillary endothelial hyperplasia that extensively involved a large, traumatic, deep soft-tissue hematoma in a 19-year-old man and clinically presented as a soft- tissue sarcoma. We also summarize characteristics of 314 cases of papillary endothelial hyperplasia reported in the literature and identify 13 likely cases of the rare extravascular form.

Original languageEnglish (US)
Pages (from-to)259-263
Number of pages5
JournalArchives of Pathology and Laboratory Medicine
Issue number3
StatePublished - Jan 1 1993
Externally publishedYes


ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Medical Laboratory Technology

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