Presentation
Knee pain. No history of trauma.
Patient Data
Age: 50 years
Gender: Female
From the case:
Bipartite patella (H Saupe type III)
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Small bony fragment noted in the superolateral aspect of the right patella with smooth margin without sclerotic changes.
Case Discussion
Bipartite patella is a result of the failure of fusion of a secondary ossification center and should not be mistaken for patella fracture:
- no history of trauma
- located superolaterally (type III is by far the most common type occurs in 75%)
- have rounded and smooth border without sclerosis
- contralateral knee x-ray may have similar findings because bipartite patella is bilateral in 50% cases