Female 25 years old Reason: assess ACL graft History: laxity in ACL repaired right knee. MENISCI: There is deformity of the undersurface of the posterior aspect of the body of the medial meniscus extending into the posterior horn, with clefts of fluid signal intensity disrupting the undersurface of the meniscus. We do not have a previous MRI study for comparison, but these findings are strongly suggestive of a persistent unhealed tear, a retear, or a new tear of the medial meniscus. There also appears to be small parameniscal cyst posterior to the posterior horn. The anterior horn of the medial meniscus appears intact.The body of the lateral meniscus appear slightly blunted along its free edge. While it is conceivable that this could represent mild tearing or fraying along the free edge, this may simply reflect prior partial meniscectomy.ARTICULAR CARTILAGE AND BONE: There is a small full-thickness cleft through the articular cartilage of the lateral tibial plateau, beneath the posterior horn of the lateral meniscus (see image 10 of series 5). The remainder of the articular cartilage is unremarkable. The bone marrow signal is within normal limits.LIGAMENTS: Patient is status post anterior cruciate ligament reconstruction; the graft appears intact. A subcentimeter focus of low signal intensity between the anterior aspect of the graft and intracondylar notch could conceivably represent a small focus of arthrofibrosis, but this is equivocal and may not be of any clinical significance.Posterior cruciate ligament, medial collateral ligament, and lateral collateral ligament complex are intact.EXTENSOR MECHANISM: Extensor mechanism is intact.ADDITIONAL
1.Postoperative changes of anterior cruciate ligament reconstruction; the graft appears intact. 2.Medial meniscal abnormality as described above is suggestive of a tear. As we do not have previous MR imaging, we cannot determine if this is a new tear, a retear, or an old tear that has not healed.3.Small full-thickness cleft of the articular cartilage of the lateral tibial plateau.