Repetitive stress on the patellar tendon can make the growth plate within the knee become inflamed and irritated (traction apophysitis). On radiographs, one or more foci of ossification can be seen at the lower pole of the patella. MRI shows an abnormal signal in the lower patella with irregular cortical margins and bone fragmentation. Thickening of the proximal patellar tendon and diffuse edema of the Hoffa’s fat pad are common findings while distal femoral cortical irregularity is an occasional finding.  

Case courtesy Dr.ssa Laura Braccaioli

Radiographer: TSRM Fabio Imola