Ear
Inflammatory / infectious / autoimmune / systemic disorders
Idiopathic auricular ossificans


Topic Completed: 1 October 2013

Revised: 26 August 2019

Revised: 07 January 2019

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PubMed Search: auricular ossificans


Nat Pernick, M.D.
Page views in 2018: 150
Page views in 2019 to date: 137
Cite this page: Pernick N. Idiopathic auricular ossificans. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earidiopathicauricularossificans.html. Accessed October 20th, 2019.
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)
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