OBJECTIVE: Spontaneous osteonecrosis of the knee affects patients typically over the age of fifty-five years. Evidence exists that this process may not be true necrosis. The purpose of this study was to characterize the demographic, radiographic, and pathologic features of this condition. MATERIALS AND METHODS: Twenty-one patients (twenty-two knees) consecutively treated for spontaneous osteonecrosis of the knee were studied. RESULTS: Only one of twenty-two specimens demonstrated evidence of bone necrosis. No specimens showed fat necrosis, marrow necrosis, fibrous change or appositional bone repair. Fourteen of twenty-two specimens (64%) showed significant osteopenia and fifteen of twenty-two specimens (68%) showed evidence of osteoarthritis. CONCLUSIONS: This study demonstrated that spontaneous osteonecrosis of the knee is not an osteonecrotic condition and has been misnamed. Osteopenia and osteoarthritis may play a role in the pathogenesis of this disease.
OBJECTIVE: Spontaneous osteonecrosis of the knee affects patients typically over the age of fifty-five years. Evidence exists that this process may not be true necrosis. The purpose of this study was to characterize the demographic, radiographic, and pathologic features of this condition. MATERIALS AND METHODS: Twenty-one patients (twenty-two knees) consecutively treated for spontaneous osteonecrosis of the knee were studied. RESULTS: Only one of twenty-two specimens demonstrated evidence of bone necrosis. No specimens showed fat necrosis, marrow necrosis, fibrous change or appositional bone repair. Fourteen of twenty-two specimens (64%) showed significant osteopenia and fifteen of twenty-two specimens (68%) showed evidence of osteoarthritis. CONCLUSIONS: This study demonstrated that spontaneous osteonecrosis of the knee is not an osteonecrotic condition and has been misnamed. Osteopenia and osteoarthritis may play a role in the pathogenesis of this disease.
Authors: Rahel B Schmid; Dieter Wirz; Beat Göpfert; Markus P Arnold; Niklaus F Friederich; Michael T Hirschmann Journal: Knee Surg Sports Traumatol Arthrosc Date: 2010-12-11 Impact factor: 4.342
Authors: Niv Marom; Jonathan Ej Koch; Yiftah Beer; Martin Ellis; Gil Ganot; Meir Nyska; Guy Maoz; Iftach Hetsroni Journal: Cartilage Date: 2018-01-07 Impact factor: 4.634
Authors: Sara K Plett; Lauren A Hackney; Ursula Heilmeier; Lorenzo Nardo; Aihong Yu; Chiyuan A Zhang; Thomas M Link Journal: Skeletal Radiol Date: 2015-08-20 Impact factor: 2.199
Authors: Samia Sayyid; Yara Younan; Gulshan Sharma; Adam Singer; William Morrison; Adam Zoga; Felix M Gonzalez Journal: Skeletal Radiol Date: 2019-06-27 Impact factor: 2.199