Evaluate for ACL versus meniscal tear. MCL sprain months ago with instability and intermittent swelling. MENISCI: Signal characteristics and morphology is normal in both the medial and lateral menisci without evidence of discrete tear.ARTICULAR CARTILAGE AND BONE: Articular cartilage in the medial, lateral, and patellofemoral compartments is intact. Bone marrow signal characteristics are within normal limits.LIGAMENTS: There is increased fluid signal within the ACL with some fibers intact, suggestive of partial tearing.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Partial ACL tear, as above.