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Skeletal Radiology

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01.10.2007 | Scientific Article

Magnetic resonance imaging in the evaluation of osteochondritis dissecans of the patella

verfasst von: Yun Sun Choi, Noah A. Cohen, Hollis G. Potter, Douglas N. Mintz

Erschienen in: Skeletal Radiology | Ausgabe 10/2007

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Abstract

Objective

The objective was to evaluate the magnetic resonance (MR) appearance of patellar osteochondritis dissecans (OCD).

Materials and methods

We retrospectively analyzed MR images of 16 patients (18 cases, mean age 20 years) using OCD of the patella. In 5 cases surgery was carried out, and we compared the surgical findings with the MR imaging findings in these cases.

Results

In all 18 cases, OCD was located central-inferiorly on the patella, and the average size was 11 × 11 × 7 mm. Subchondral deformities were present in 16 out of 18 cases (88.9%), subchondral cyst formation in 4 cases (22.2%), reactive bone marrow signal in 8 cases (44.4%), overlying patellar cartilage abnormality in 14 cases (77.8%), loose body in 2 cases (11.1%), patella alta in 8 cases (44.4%), hypoplastic sulcus in 7 cases (38.9%), and synovitis in 4 cases (22.2%). In all 5 cases in which surgery was carried out, the cartilage abnormality classified on the MR images was confirmed, and a loose body was removed at arthroscopy in 2 of the 5 cases.

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.

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Titel: Magnetic resonance imaging in the evaluation of osteochondritis dissecans of the patella
verfasst von: Yun Sun Choi
Noah A. Cohen
Hollis G. Potter
Douglas N. Mintz
Publikationsdatum: 01.10.2007
Verlag: Springer-Verlag
Erschienen in: Skeletal Radiology / Ausgabe 10/2007
Print ISSN: 0364-2348
Elektronische ISSN: 1432-2161
DOI: https://doi.org/10.1007/s00256-007-0357-8

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Magnetic resonance imaging in the evaluation of osteochondritis dissecans of the patella

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Materials and methods

Results

Conclusion

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