Tripartite patella

Case contributed by Dr Craig Hacking

Presentation

Knee pain post fall.

Patient Data

Age: 55 years
Gender: Male
X-ray

Alignment is normal. No fracture identified. (The lateral was normal, without evidence of joint effusion.)

Incidental tripartite patella, a normal anatomic variant.

Case Discussion

With a multipartite patella, the volume of the true patella plus that of the smaller ossification centers is greater than that expected of a normal patella. The DDx is obviously a patellar fracture, where the volume of the fractured components is equivalent to that of a normal patella.

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Case information

rID: 53773
Published: 6th Jun 2017
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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