Other tumors of bone
Epidermoid inclusion cyst

Topic Completed: 1 June 2005

Minor changes: 11 July 2019

Copyright: 2003-2019,, Inc.

PubMed search: epidermoid inclusion cyst [title]

Nat Pernick, M.D.
Page views in 2019: 2,379
Page views in 2020 to date: 626
Cite this page: Pernick N. Epidermoid inclusion cyst. website. Accessed May 26th, 2020.
Definition / general
  • Due to squamous epithelium embedded within bone
  • Benign, resembles cutaneous lesion
  • Ages 25 - 50 years
  • Sites: skull, distal phalanx, less commonly in toes
Radiology description
  • Well defined, radiolucent lesion, often associated with soft tissue swelling
Case reports
  • Excision, not amputation
Microscopic (histologic) description
  • Cyst wall composed of keratinized stratified squamous epithelium with keratin debris
  • No skin appendages
Microscopic (histologic) images

Images hosted on other servers:

Xray, toe, H&E

Differential diagnosis
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