A chondroma appears as a clear area in a skiagram.
"Manual of Surgery" by Alexis Thomson and Alexander Miles
Fragmentation is exhibited in the skiagram forming the subject of plate XI.
"Surgical Experiences in South Africa, 1899-1900" by George Henry Makins
It should be noted that all the above changes can be followed in skiagrams.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition." by Alexander Miles