Diseases of Subchondral Bone 2. Issue 2 (June 2016)

• Record Type: Journal Article
• Authors: Lerebours, Frantz; ElAttrache, Neal S.; Mandelbaum, Bert
• Is Part Of: Sports medicine and arthroscopy review. Volume 24:Issue 2(2016)
• Page Start: 50
• Page End: 55
• Publication Date: 2016-06
• Subjects: SONK -- osteonecrosis -- subchondral bone -- secondary osteonecrosis -- post-arthroscopic -- core decompression; Sports medicine -- Periodicals; Arthroscopy -- Periodicals; 617.1027
• DOI: 10.1097/JSA.0000000000000116
• Languages: English
• ISSNs: 1062-8592

Abstract

Abstract : Osteonecrosis of the knee can be divided into the following 3 categories: primary or Spontaneous osteonecrosis of the knee (SONK), secondary osteonecrosis (ON), and postarthroscopic osteonecrosis. Patient characteristics as well as underlying risk factors can help categorize the type of osteonecrosis and guide treatment. SONK was first described by Ahlback et al in 1968. It is described as a disease of subchondral bone that leads to focal ischemia and bone marrow edema, necrosis, and possible subsequent structural collapse. SONK typically presents in the older women with frequent involvement of the medial femoral condyle. Secondary osteonecrosis is typically present in patients below 55 years of age. Unlike SONK, secondary ON presents multiple foci of bone marrow involvement with extension into the metaphysis and diaphysis. Postarthroscopic ON has been described after arthroscopic meniscectomy, shaver-assisted chondroplasty, anterior cruciate ligament reconstruction, and laser or radiofrequency-assisted debridement.