Bone & joints

Other chondrogenic tumors

Enchondroma of long bones

Topic Completed: 1 August 2013

Minor changes: 6 October 2021

Copyright: 2003-2019,, Inc.

PubMed Search: Enchondromas [title] long bones

Nat Pernick, M.D.
Page views in 2020: 3,608
Page views in 2021 to date: 3,969
Cite this page: Pernick N. Enchondroma of long bones. website. Accessed October 25th, 2021.
Definition / general
  • Enchondroma protuberans: rare, exaggeratedly eccentric enchondroma resembling osteochondroma radiologically (Hum Pathol 1982;13:734)
Radiology description
  • Well circumscribed tumor of metaphysis or diaphysis with flecks of calcification
  • Doesn’t invade the cortex
Radiology images

AFIP images

Enchondroma of distal femur

Enchondromatosis (Ollier disease)

 Contributed by Dr. Mark R. Wick

Tibia Xray

Multifocal in Ollier disease, CT scan

Distal femur Xray

Femur Xray

Gross description
  • Well circumscribed, pale blue, solid, no myxoid change
Gross images

Images hosted on Pathout server:

AFIP images

Enchondroma expands the rib

 Contributed by Dr. Mark R. Wick

Multifocal in Ollier disease

Microscopic (histologic) description
  • Hypocellular, few binucleated cells, may be multifocal but does not infiltrate marrow
  • No myxoid change
Microscopic (histologic) images

AFIP images

Islands of cartilage

Sparsely cellular cartilage

Cellular areas with moderate nuclear pleomorphism

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