ACL mucoid degeneration - celery stalk sign
Restricted movements of the left knee.
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The ACL is thickened, ill-defined of high signal. The longitudinal fibers are intact, separated from each other by higher signal mucinous material well-visualized on T2 and PD fat sat sequences, giving a "celery stalk" appearance.
Mild joint effusion. A small popliteal cyst is noted.
No associated meniscal tear or ligamentous injuries is seen.