Female 22 years old Reason: evaluate for ACL tear or other ligament injury History: pain, swelling after feeling a "pop" during ultimate frisbee practice. MENISCI: There is complex tearing of the anterior horn, body and posterior horn of the lateral meniscus consisting of a predominantly horizontal component which extends to the superior articular surface. There is a globular focus of intermediate signal within the posterior horn which may reflect degeneration. Heterogeneous signal abnormality lateral to the body in the lateral gutter likely represents debris but a small flap tear cannot be completely excluded.ARTICULAR CARTILAGE AND BONE: No significant abnormality noted.LIGAMENTS: No significant abnormality noted. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Complex tearing of the entire lateral meniscus as described above.