Unfused tibial tubercle

Case contributed by Ashesh Ishwarlal Ranchod
Diagnosis almost certain

Presentation

Incidental finding. The patient felt a bony protrusion at the level of her knee, asymptomatic on history.

Patient Data

Age: 30 years
Gender: Female
x-ray

There is a non-fragmented and unfused left tibial apophysis in an adult patient. There is minimal regional soft tissue prominence. The left knee is otherwise normal.

Case Discussion

This adult patient presents with an asymptomatic left knee and negative history of previous or childhood pain. There is no recent or past trauma. There is an unexpected finding of a bony fragment suspected to represent an unfused tibial apophysis. The absence of childhood pain and the confirmed absence of trauma suggest the adult presentation of childhood Osgood Schlatter to be less likely. In addition, there is an absence of tibial apophyseal fragmentation or abnormal elevation, and non-calcification of the distal patellar tendon. There is mild focal soft tissue swelling however the patient remains asymptomatic and pain-free, especially on point pressure.

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