Presentation
Instability following twisting injury
Patient Data
Age: 18 years
Gender: Male
From the case:
Dorsal defect of patella
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Sagittal PD fat sat
Bony irregularity is seen along superolateral aspect of patella with intact overlying articular cartilage.
Complete anterior cruciate ligament tear is seen with vertical longitudinal tear of posterior horn of medial meniscus.
Case Discussion
Findings are consistent with dorsal defect of patella. It is a developmental variant, an incidental finding and should not be mistaken for chondromalacia or osteochondral lesion specially in a post-traumatic setting as in the above case.
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