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Comments on Beattie et al Comments on Beattie et al.: Abnormalities identified in the knees of asymptomatic volunteers using peripheral magnetic resonance imaging A. Karantanas, M.D. Osteoarthritis and Cartilage Volume 13, Issue 9, Pages 841-843 (September 2005) DOI: 10.1016/j.joca.2005.06.004 Copyright © 2005 OsteoArthritis Research Society International Terms and Conditions

Fig. 1 Female, 59 years old with a history of 4-year pain in the medial knee joint and a clinical diagnosis of OA. (a) PD-fat suppressed Fast Spin Echo image in the sagittal plane shows meniscal degeneration, joint effusion, cartilage erosion and bone marrow “edema” like lesion (arrow). (b) 3D-T1-w GRE sequence in the same plane shows to better advantage the marginal osteophyte (thick arrow), the central osteophyte (long arrow) and the cartilage erosion (double arrow). However, this sequence is not able to demonstrate the bone marrow changes. Osteoarthritis and Cartilage 2005 13, 841-843DOI: (10.1016/j.joca.2005.06.004) Copyright © 2005 OsteoArthritis Research Society International Terms and Conditions

Fig. 2 Male, 23 years old with a history of a twisting injury during football. (a) The coronal fat suppressed PD Fast Spin Echo image shows an extensive bone bruise in the lateral femoral condyle (long arrows) and an osteochondral impaction injury (thick arrow). (b) A T2-w GRE image in the sagittal plane shows to better advantage the osteochondral injury (arrow) but is unable to demonstrate any bone marrow pathology in the lateral femoral condyle. Osteoarthritis and Cartilage 2005 13, 841-843DOI: (10.1016/j.joca.2005.06.004) Copyright © 2005 OsteoArthritis Research Society International Terms and Conditions