Ear

Inflammatory / infectious / autoimmune / systemic disorders

Granulomatosis with polyangiitis



Topic Completed: 1 October 2013

Minor changes: 14 December 2020

Copyright: 2002-2021, PathologyOutlines.com, Inc.

PubMed Search: Granulomatosis with polyangiitis [title] ear


Nat Pernick, M.D.
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Cite this page: Pernick N. Granulomatosis with polyangiitis. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/earwegenersgran.html. Accessed December 8th, 2021.
Definition / general
  • Systemic necrotizing vasculitis that typically involves kidneys, lung, upper aerodigestive tract
  • Otologic involvement (otitis media, tympanic membrane perforation, sensorineural hearing loss, perforation of ear lobes, external otitis) as well as facial palsy occurs in 20 - 60% who have disease at traditional sites
Terminology
Laboratory
  • Elevated serum ANCA
Treatment
  • Corticosteroids, immunosuppressive drugs may cause long term remission and reverse hearing loss and facial palsy
Microscopic (histologic) description
  • Vasculitis, necrosis or granulomatous inflammation (few cases have all 3)
  • Extra levels / recuts increases sensitivity by 7% (Ann Pathol 2005;25:87)
Differential diagnosis
  • Polyarteritis nodosa: necrotizing vasculitis of small to medium sized muscular arteries
  • Rheumatoid arthritis: conductive hearing loss due to involvement of incus-maleus and incus-stapes articulations
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