Bipartite patella

Presentation

Left knee pain.

Patient Data

Age: 40-45 years
Gender: Male
Modality: X-ray

Bilateral bipartite patella.

Modality: MRI

A bony fragment is seen at the superolateral aspect of the patella which shows no bone marrow edema or contusion…consistent with bipartite patella.

Moderate joint effusion.

There is a medial meniscal tear and elevated signal in the anterior cruciate ligament on the water-sensitive sequences, which are likely post-traumatic and resulting in the patient's symptoms.

Case Discussion

A bipartite patella (two-part patella) is a patella with an unfused accessory ossification center at the superolateral aspect. It can mimic a fracture, but the classic location and the rounded edges of the "fragment" suggest the diagnosis, and it may be bilateral as in this case.

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Case Information

rID: 52347
Case created: 3rd Apr 2017
Last edited: 5th Apr 2017
Inclusion in quiz mode: Excluded

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