Reason: evaluate for patellar tendon rupture, other intra-articular knee pathology History: R knee injury, inability to extend, effusion. Due to the patient's body habitus, the high-definition knee coil could not be used. An alternative coil was used resulting in suboptimal image quality.MENISCI: No fluid-filled meniscal tears are evident.ARTICULAR CARTILAGE AND BONE: Evaluation of the articular cartilage is limited. There is moderate degeneration of the articular cartilage of the medial facet of the patella with near full-thickness to full-thickness fissuring. The remainder of the articular cartilage is unremarkable, given the aforementioned limitations.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: There is rupture of the patellar tendon at its attachment to the patella with a small portion of the tendon remaining attached to the patella, laterally. There is thickening and increased signal intensity of the tendon likely reflecting underlying moderate to severe tendinosis. The rupture results in a gap of just under 1 cm. There is also thickening and intermediate signal intensity within the distal quadriceps tendon suggesting tendinosis. There is also disruption of the lateral retinaculum with fluid from the joint insinuating between the torn retinacular fibers. The medial retinaculum also appears abnormally thickened with linear increased signal intensity traversing its anterior fibers suggesting a tear.ADDITIONAL
1. Limited study as described above.2. Patellar tendon rupture with additional tearing of the medial and lateral retinacula and tendinosis of the quadriceps and patellar tendons.3. Degeneration of the articular cartilage of the medial facet of the patella.