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MRI Quantitative Morphologic Analysis of Patellofemoral Region: Lack of Correlation with Chondromalacia Patellae at Surgery

Yoshimi Endo1,2, Mark E. Schweitzer1, Marcelo Bordalo-Rodrigues1,3, Andrew S. Rokito4 and James S. Babb5

1 Department of Radiology, New York University, Hospital for Joint Diseases Orthopaedic Institute, New York, NY.
2 Present address: Department of Radiology, State University of New York Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203.
3 Present address: Radiology Department, Hospital das Clinicas, University of São Paulo School of Medicine, São Paulo, Brazil.
4 Department of Orthopaedic Surgery, New York University, Hospital for Joint Diseases Orthopaedic Institute, New York, NY.
5 Department of Radiology, New York University School of Medicine, New York, NY.


Figure 1
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  		Fig. 1A —41-year-old man (A and C) and 42-year-old man (B) with chondromalacia patellae. Axial MR images show lengths of lateral and medial facets (A) and interfacet angle (B) through middle of patella. Similar measurements were made at superior and inferior slices of patella for each knee.

 

Figure 2
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  		Fig. 1B —41-year-old man (A and C) and 42-year-old man (B) with chondromalacia patellae. Axial MR images show lengths of lateral and medial facets (A) and interfacet angle (B) through middle of patella. Similar measurements were made at superior and inferior slices of patella for each knee.

 

Figure 3
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  		Fig. 1C —41-year-old man (A and C) and 42-year-old man (B) with chondromalacia patellae. Axial MR image shows depth of trochlea measured at single axial slice revealing greatest depth.

 

Figure 4
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  		Fig. 2A —42-year-old man with chondromalacia patellae (A) and 45-year-old man without chondromalacia patellae (B). Sagittal MR image shows lengths of patella and patellar tendon through sagittal slice with greatest patellar length. Patellar tendon-to-patella length ratio was calculated.

 

Figure 5
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  		Fig. 2B —42-year-old man with chondromalacia patellae (A) and 45-year-old man without chondromalacia patellae (B). Sagittal MR image shows overlap of articular surfaces of patella and trochlea.

 

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