Introduction Overuse injury causing anterior knee pain at the inferior pole of patella at the proximal patella tendon attachment similar to Osgood-Schlatter's disease which is at the distal attachment of the patella tendon differnt from Jumper's Knee which is tendonitis of the patella tendon Epidemiology demographics more common in adolescence Location patellar tendon insertion at the inferior pole of the patella Pathophysiology chronic injury similar pathogenesis to Osgood-Schlatter overuse causes a traction apophysitis Classification Blazina Classification Stage 1 Pain occurs after activity Stage 2 Pain present while performing activity and persists after activity Stage 3 Pain affecting/limiting function during activity Presentation History insidious onset of pain on anterior aspect of knee after or during activity Physical exam tenderness over inferior patella swelling Imaging Radiographs recommended views AP and lateral of knee findings may be normal may show spur at inferior pole of patella MRI indications if diagnosis unclear views inflammation best seen on T2 sagitals bony spurs best seen on T1 sagitals Treatment Nonoperative activity modifications, NSAIDS, physical therapy indications mainstay of treatment usually a self limiting process Operative debridement of damaged tissue/stimulation of healing response in some cases refractory to nonoperative treatment