Enchondroma-Enchondroma is a benign cartilage tumor.
-Frequently it is a coincidental finding.
-In the phalanges of the hand it frequently presents with a fracture.
-It is the most common lesion in the phalanges, i.e. a well-defined lytic lesion in the hand is almost always an enchondroma.
-In some locations it can be difficult to differentiate between enchondroma and bone infarct.
-It is almost impossible to differentiate between enchondroma and low grade chondrosarcoma based on radiographic features alone.
-Ollier's disease is multiple enchondromas.
-Maffucci's syndrome is multiple enchondromas with soft tissue hemangiomas.
-Features that favor the diagnosis of a low-grade chondrosarcoma:
Higher age Size > 5 cm
Activity on bone scan
Fast enhancement on dynamic contrast enhanced MR series
Endosteal scalloping of the cortical bone
Discriminators :
Must have calcification except in phalanges.
No periostitis.
http://www.radiologyassistant.nl/en/4bc6176e56228
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