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

Topic Completed: 1 October 2013

Revised: 22 January 2019

Copyright: (c) 2002-2019, PathologyOutlines.com, Inc.

PubMed Search: Chondroblastoma [title] ear

Nat Pernick, M.D.
Page views in 2018: 530
Page views in 2019 to date: 498
Cite this page: Pernick N. Chondroblastoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earchondroblastoma.html. Accessed December 6th, 2019.
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
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