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Incidental Skeletal Abnormalities in a 22-Year-Old Man

A 22-year-old man presented to the emergency department because of trauma. Radiographic images are shown below (Figures ​(Figures11–3). 
 
 
 
Figure 1 
 
Oblique radiograph of the hand and wrist demonstrates multiple radio lucent, expansile masses of varying shapes in the phalanges, metacarpals, radius, and ulna. 
 
 
 
 
 
Figure 3 
 
Axial computed tomography (CT) image of the skull base shows an expansile, cartilaginous mass (arrow) involving the parasellar area and petrous spices. 
 
 
 
For diagnosis and discussion, see the following page. 
 
DIAGNOSIS: Enchondromatosis (Ollier's disease).