Exterior surface of an osteochondroma
Exterior surface of an osteochondroma

This is the exterior (uncut) surface of an osteochondroma.
The surface looks shiny and glistening because the tumor is composed, on the outside, of cartilage.
In this uncut surface, we are looking at the cartilagenous surface.
Note the furrows that create the bosselated appearance.
This is typical of an osteochondroma.
(Description By:T.V.Rajan, M.D. )
(Image Contrib. by: Hartford Hospital )