[Osteochondritis dissecans of knee; 3 case reports].

Osteochondritis dissecans refers to a focal area of subchondral bone that undergoes necrosis with or without detachment due to lack of vascularity. Osteochondritis dissecans is most common cause of loose bodies in knee joint and the symptoms vary from continuous dull aching pain to locking of the joint. We present a case of Osteochondritis dissecans of knee in a female adult patient. She underwent an arthrotomy for removal of the fairly large loose fragment ever reported in our hospital. The objective of this report is, as the clinical signs may be subtle in Osteochondritis dissecans early diagnosis and appropriate treatment should be done to prevent long term sequelae.