Middle ear, inner ear and temporal bone tumors - benign / nonneoplastic

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

Revised: 23 February 2018, last major update October 2013

Copyright: (c) 2002-2018, PathologyOutlines.com, Inc.

PubMed Search: Chondroblastoma [title] ear

Cite this page: Pernick, N. Chondroblastoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earchondroblastoma.html. Accessed October 17th, 2018.
Definition / general
  • Rare, often in lateral temporal bone
  • Usually males
Case reports
  • Wide excision but 50% recur
Microscopic (histologic) description
  • Clusters of round / polygonal chondroblasts with oval or grooved nuclei and well defined cell borders
  • Multinucleated giant cells
  • May have aneurysmal bone cyst like areas, chondroid matrix
Positive stains
Negative stains