Bipartite Patella X-Ray
Unfused accessory ossification center
Superolateral Aspect of Patella
2% of the population.
Bilateral = 43%
Men more than Women
Usually incidental finding
2% of patients experience symptoms (anterior knee pain)
Less commonly there can be Tripartite or Multipartite
Fracture versus Bipartite Patella
Superior lateral location = more likely Bipartite Patella
Osseous remodeling at Ossicles Interface = more likely Bipartite Patella
Prior Xrays of the Knee will Extremely Helpful
Clinical History such as Mechanism of Injury and/or Location of Site of pain will be helpful to Differentiate between Bipartite patella versus Fracture.
If there is a persistent suspicion for Fracture or if there is clinical concern for pain arising from presumed Bipartite Patella then MRI is the tool of choice to evaluate for secondary findings which will help demonstrate findings of acute fracture versus Bipartite Patella.
Remember- “The Eyes Will Not See What The Brain Does Not Know”