Presentation
Knee pain
Patient Data
Age: 25 years
Gender: Male
From the case:
Patella shape - Wiberg type 1 or a
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MRI study shows features of Wiberg type 1 or a of the patella in the term of:
- roughly symmetrical facets
- concave facets
- equally sized facets
Minimal joint effusion is also noted
From the case:
Patella shape - Wiberg type 1 or a
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Annotated images highlight the findings
Case Discussion
Wiberg classification is a system used to describe the shape of the patella based mainly on the asymmetry between the patellar medial and lateral facets on axial views of the patella. Increasing number type indicates a larger degree of asymmetry.
This case is a good example of Wiberg type 1 or a. Although presumably the ideal shape of the patella, it is rather uncommon, occurring in only 10% of the general population
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