Nasal cavity, paranasal sinuses, nasopharynx
Other tumors
Fibroosseous lesions

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

Revised: 23 May 2018, last major update November 2004

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

PubMed Search: Fibro osseous lesions nasal

Table of Contents
Definition / general
Cite this page: Pernick, N. Fibroosseous lesions. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/nasalfibroosseouslesions.html. Accessed August 20th, 2018.
Definition / general
  • Fibrous dysplasia, ossifying fibroma, cementoossifying fibroma (also called psammomatoid ossifying fibroma in extragnathic facial bones)
  • Above disorders represent parts of microscopic spectrum
  • Fibrous dysplasia: irregular shapes ("Chinese letters") of woven bone without osteoblastic rimming; Xray usually shows ill defined borders and ground glass or orange peel quality; 20% recur
  • Ossifying fibroma: trabeculae of lamellar bone with prominent osteoblastic rimming; Xray usually shows well circumscribed margins and punched out appearance; rarely recurs
  • Cementoossifying fibroma: sharply defined, irregular, calcified spherules in densely fibrotic stroma with nonlinear bony trabeculae