Causes of osteochondrosis
The condition usually first appears in youngsters who are growing rapidly, and it is thought that there is a problem with local blood supply to areas of cartilage and its underlying bone. Sometimes this term is used interchangeably with 'osteochondritis'.
(In the knee)..."Osgood-Schlatter and Sinding-Larsen-Johannson diseases are common causes of anterior knee pain that is aggravated by jumping activities and kneeling....genetic causes, repetitive trauma, vascular abnormalities, mechanical factors, and hormonal imbalances may all play a role".....