Inflammatory / infectious / autoimmune / systemic disorders
Idiopathic auricular ossificans

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

Revised: 8 February 2018, last major update October 2013

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

PubMed Search: auricular ossificans

Cite this page: Pernick, N. Idiopathic auricular ossificans. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earidiopathicauricularossificans.html. Accessed March 17th, 2018.
Definition / general
  • Ectopic calcification of auricle ("rigid ear") of unknown etiology
  • Very rare (< 20 cases reported)
Case reports
Microscopic (histologic) description
  • Cartilaginous replacement by bone
Microscopic (histologic) images

Images hosted on other servers:
Missing Image

A: grossly normal ear
B: spicules of lamellar bone
C: CT scan shows bony opacities in auricular cartilage
D: osteocytes and cement lines are present

Differential diagnosis
  • Specific causes (frostbite, physical trauma, inflammatory conditions, Addison disease)