Inflammatory / infectious / autoimmune / systemic disorders

Paget disease of temporal bone

Last author update: 1 October 2013
Last staff update: 30 September 2020

Copyright: 2002-2023, PathologyOutlines.com, Inc.

PubMed Search: Paget disease of temporal bone

Nat Pernick, M.D.
Page views in 2022: 279
Page views in 2023 to date: 140
Cite this page: Pernick N. Paget disease of temporal bone. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/earpaget.html. Accessed June 3rd, 2023.
Definition / general
  • Also called osteitis deformans
  • Chronic progressive disease of increased bone turnover, affects skull and temporal bone in 70% of cases with hearing loss in half of these cases
  • Hearing loss is due to compression of cranial nerve VIII and apparently loss of mineral density of cochlear capsule (Laryngoscope 2004;114:598)
  • Familial cases are due to mutations in bone metabolism pathway genes (Nat Clin Pract Rheumatol 2006;2:270)
  • Causes enlargement and tortuosity of superficial temporal artery and its anterior branches
  • Also affects numerous structures of external, middle and inner ear
  • Affects 3% of population ages 40+, 11% at age 80+; men affected slightly more than women
  • 1% have transformation to osteosarcoma or other sarcoma with 5 year survival of < 10%
Microscopic (histologic) description
  • Osteolytic phase has extensive osteoclastic activity and bone resorption
  • Mixed / combined phase has osteoblastic activity exceeding osteoclastic activity
  • Osteoblastic phase has dense new bone with mosaic pattern of cement lines
Differential diagnosis
Back to top
Image 01 Image 02