Nasal cavity, paranasal sinuses, nasopharynx
Other tumors
Masson tumor

Author: Nat Pernick, M.D. (see Authors page)

Revised: 23 May 2018, last major update November 2004

Copyright: (c) 2004-2018,, Inc.

PubMed Search: Masson tumor nasal

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Cite this page: Pernick, N. Masson tumor. website. Accessed January 23rd, 2019.
Definition / general
  • Also called intravascular papillary endothelial hyperplasia
  • Benign; related to organizing thrombi but resembles angiosarcoma
  • Very rare in nasal cavity or paranasal sinus; usually in dermis and subcutis of head, neck, fingers or trunk
Case reports
Microscopic (histologic) description
  • Exuberant intravascular endothelial proliferation
Microscopic (histologic) images

Images hosted on other servers:

Tumor within dilated vascular space

Thin and thick walled vessels

Irregular anastomosing
vascular channels lined by
plump endothelial cells
with slight nuclear atypia

Differential diagnosis