34-year-old male patient with left knee pain. MENISCI: The lateral meniscus is intact.There is faint increased signal intensity within the peripheral one third of the posterior horn of the medial meniscus that appears to extend to the tibial articular surface on a single sagittal image. While it is conceivable this could represent a small tear of the vascularized peripheral meniscus, it may be healed and we see no findings to confirm an unstable tear of the meniscus.ARTICULAR CARTILAGE AND BONE: Bone marrow signal intensity is within normal limits. There is perhaps a small focal cartilage defect beneath the posterior horn of the lateral meniscus, but the articular cartilage otherwise appears normal.LIGAMENTS: The anterior and posterior cruciate ligaments are intact. There is thickening of the superficial band of the medial collateral ligament with surrounding edema indicating a sprain with partial-thickness tearing of the proximal fibers of the ligament. The lateral collateral ligament complex is intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Sprain of the medial collateral ligament with partial thickness tearing of the proximal fibers and other findings as described above.