Sinding-Larson-Johansson disease CHORUS

Description: contusion and subsequent tendonitis in the proximal attachment of the patellar tendon
* can be followed by calcification, ossification, or frank inferior pole avulsion fractures that produce one or more distinct ossicles.
per Stedman's dictionary: "apophysitis of the distal pole of the patella"
symptoms:
* tenderness and soft tissue swelling over the lower pole of the patella
* aggregated by activity
xray findings:
* osseous fragmentation of patella