Sinding-Larsen-Johansson disease


  • Knee pain
  • Probably traumatic (traction injury) origin
  • Closely related to Osgood-Schlatter's


  • Children and adolescents 10-14 years
  • Knee pain aggravated by activity
  • Tenderness and soft tissue swelling over the inferior pole of the patella.


  • X-ray (right) - osseous fragmentation at lower pole patella
  • NOT an apophysitis or osteochondritis.
  • Patellar fracture or avulsion infrequent.
  • The calcifications are usually incorporated into the inferior pole of the patella, and the natural course of the condition is 3-12 months.


  • Treated symptomatically
  • Also responds to quads strengthening exercises
  • Rarely, debridement of patellar tendon needed
  • No need follow up x-ray in most
Sinding Larsen Johansson Sinding Larsen Johansson
Sindig Larsen

Content by Dr Íomhar O' Sullivan 03/03/2006. Reviewed br Dr ÍOS 11/01/2007.  Last reviewed Dr ÍOS 16/12/19