刊期详情

Head and Neck Imaging订阅

MRI Manifestations of Osteochondritis Dissecans in the Patella

Author：XIAO Lin, HU Jian-bo, WU Ze-wen, TAN Jing-an

affiliation：Guangzhou University of Traditional Chinese Medicine Orthopaedic Hospital Department of Radiology, Guangdong Guangzhou 510240, China

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Abstract

Objective The objective was to explore the magnetic resonance manifestations of patellar osteochondritis dissecans (OCD). Methods We retrospectively analyzed MR images of 18 cases using OCD of the patella confirmed by clinical or surgery. In 5 cases, surgery was carried out, and we compared the surgical findings with the MR findings in these cases. Results In all 18 cases, OCD was located central-inferiorly on the patella, and the average size was 11×11×7mm. Subchondral deformities was present in 16 out of 18 cases, subchondral cyst formation in 4 cases, reactive bone marrow edema in 8 cases, overlying patellar cartilage abnormality in 14 cases, loose body in 2 cases, patella alta in 8 cases, hypoplastic sulcus in 7 cases, and synovitis in 4 cases. In all 5 cases in which surgery was carried out, the cartilage abnormality on the MR images was confirmed. Conclusion Magnetic resonance imaging of patellar OCD typically shows subchondral deformity and variable abnormalities of the overlying patellar cartilage located central-inferiorly on the patella.

【Keyword】Patella; Osteochondritis Dissecans; Magnetic Resonance Imaging

【Chart number】R684.3; R445.2

【Document Identification Number】A

【DOI】 10.3969/j.issn.1672-5131.2015.01.33

Chinese journal of CT and MRI

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