Inflammatory / infectious / autoimmune / systemic disorders
Idiopathic cystic chondromalacia of auricular cartilage

Topic Completed: 1 October 2013

Revised: 07 January 2019

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PubMed Search: Cystic chondromalacia of auricular cartilage

Nat Pernick, M.D.
Page views in 2018: 814
Page views in 2019 to date: 859
Cite this page: Pernick N. Idiopathic cystic chondromalacia of auricular cartilage. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earidiopathiccystic.html. Accessed October 21st, 2019.
Definition / general
  • Also called auricular or endochondral pseudocyst
  • Benign cystic degeneration of auricular cartilage of unknown cause
  • Usually men age 20 - 40 years
  • Unilateral swelling of cartilage over weeks to years, most commonly on scaphoid fossa of auricle
  • May be due to minor trauma
Case reports
  • Excision
Microscopic (histologic) description
  • Fluid filled distended mass composed of cyst like wall with fibrous and granulation tissue lining but no epithelium
  • Cyst contains 1 - 2 mm rim of cartilage
  • Cyst fluid resembles olive oil
  • No / mild atypia
Microscopic (histologic) images

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Central cystic degeneration of auricular cartilage

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Factor VIII+ lining of pseudocyst

Differential diagnosis
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