Female 58 years old Reason: evaluate etiology of medial knee pain. Status post left knee arthroscopy 11/2014, with partial meniscectomy and patellofemoral microfracture. MENISCI: There is truncation of the body of the medial meniscus suggestive of interval partial meniscectomy. There is also intermediate globular signal within the body of the medial meniscus extending to the tibial articular surface. This extends into the posterior horn of the medial meniscus as well. There is slight prominence of meniscal tissue along the periphery of the body of the medial meniscus (image 18, series 11). While these findings may represent postoperative changes, they are concerning for undersurface tear with a displaced meniscus fragment into the medial gutter. A small adjacent loculated collection of fluid signal intensity may represent a cyst or fluid in the medial collateral ligament bursa. No significant abnormality is noted within the lateral meniscus.ARTICULAR CARTILAGE AND BONE: Again seen is full-thickness degeneration of the articular cartilage of the medial facet of the patella as well as of the median eminence of the patella. Relatively mild degeneration of the articular cartilage of the lateral facet of the patella with signal abnormality in the underlying bone which is presumably degenerative. There is a new full-thickness defect in the femoral trochlea centrally (image 13, series 8), with thinning of the articular cartilage along the medial facet that is similar to prior study. There has been progression of cartilage degeneration along the weight-bearing portion of the medial femoral condyle with new subchondral edema type signal. There is also new focal partial thickness defect along the articular cartilage of the medial tibial plateau. The articular cartilage of the lateral compartment is relatively intact. Note is made of tricompartmental osteophytes.LIGAMENTS: Cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Postoperative changes as described above including findings compatible with partial meniscectomy, however there is signal abnormality and deformity of the body of the medial meniscus suggestive of a undersurface flap tear.2. Progression of cartilage degeneration as described above.