Spinous Osteochondroma-CT

Bony hypertrophy in relation to the superior facet of the L2 vertebra.  There are degenerative changes in right articular facet at this level.  These findings may indicate facetal arthropathy with associated ossification versus a differential of osteochondroma in this location. As bony hypertrophy is out of propotion to the degenerative changes, osteochondroma is the first differential.   

Learning Point: Osteochondromas usually occur in the long bones and are rarely found in the spine when present in the spine, however, have a predilection for cervical or upper thoracic region arising usually from lamina of vertebrae. Osteochondroma locate in Lumbar region is relatively uncommon.

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