periosteal chondroma

Periosteal Chondroma

Definition

 

Metaphyseal Enchondroma

 

Site

 

Arise from the metaphyseal cortex of long bones

- most common in the proximal humerus

 

Histology

 

Difficult to DDx from Chondrosarcoma

 

Masses of cartilage nestling in a shallow crater in the periphery of the cortex

 

NHx

 

Don't ossify

- remain as immature cartilage