A case report published in the BMJ documents a traumatic left knee injury sustained by a male basketball player in his 30s, with clinical and radiographic findings consistent with rupture of the patellar tendon — a relatively uncommon but functionally significant injury.
How the Injury Occurred
According to the report, the injury happened during a game when the player landed from a jump. At the moment of impact, he experienced a sudden popping sensation in the knee, followed by immediate pain and an inability to bear weight on the affected leg. A splint was applied before he was transported to the emergency department.
What Examination Revealed
On physical examination, the left knee was found to be held in a fixed position with mild swelling present. Notably, the patella appeared to sit higher than its normal anatomical position — a finding known as patella alta. The patellar tendon was not clearly felt on palpation, and a depression was detected in the tissue immediately below the kneecap, suggesting a structural disruption at that site.
Active extension of the knee was both limited and painful. When the patient attempted to straighten the leg against even gentle resistance, discomfort increased markedly — a pattern that further supported concern about tendon integrity.
Imaging Findings
An anteroposterior radiograph of the left knee was obtained as part of the diagnostic workup. The image showed an abnormally elevated patella, a radiographic sign that, in the context of the clinical presentation, reinforced the suspected diagnosis of patellar tendon rupture.
Context and Significance
Patellar tendon ruptures are most commonly associated with forceful quadriceps contraction during activities that involve jumping or sudden deceleration — circumstances consistent with this reported case. The combination of an audible or felt pop, loss of weight-bearing capacity, a high-riding patella, and absent tendon palpability forms a recognisable clinical picture, as the BMJ case illustrates.
The report, which includes radiographic imaging, serves as a documented example of how this injury pattern may present in an athletic context, and underscores the value of systematic physical examination alongside imaging in reaching an accurate assessment.