Reason: Recurrent knee pain after medial menisectomy History: pain MENISCI: There is attenuation of the body and posterior horn of the medial meniscus compatible with the history of prior partial meniscectomy. There is vertically oriented signal abnormality within the peripheral half of the remaining posterior horn of the medial meniscus that extends to the tibial articular surface and is of intermediate signal intensity on the fat saturated T2-weighted images. This is compatible with a tear, although we cannot determine if this is a new tear or chronic tear in the absence of prior imaging studies. Much of the body of the medial meniscus is replaced with intermediate signal intensity on T2-weighted images that presumably represents degeneration, but we see no fluid-filled tear. The anterior horn appears intact. There is irregularity of the peripheral margin of the posterior horn of the lateral meniscus compatible with tearing, but again this may be chronic in etiology. There is globular mildly increased signal intensity within the body of the meniscus suggesting degeneration, but we see no fluid-filled tear.ARTICULAR CARTILAGE AND BONE: There is superficial fraying of the articular cartilage of the patella along the lateral facet, but we see no full-thickness articular cartilage defect. The remainder of the articular cartilage is within normal limits for age.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intactADDITIONAL
1. Surgical changes of partial medial meniscectomy. There is increased signal intensity within the posterior horn of the medial meniscus extending to the tibial articular surface compatible with a tear, although we cannot determine if this is a new or chronic tear without prior imaging studies.2. Irregularity of the peripheral aspect of the posterior horn of the lateral meniscus also compatible with tearing, although this may be chronic in etiology.3. Small joint effusion and Baker's cyst as described above.4. Mild superficial degeneration of the articular cartilage of the patella.