Table 1.

Diagnostic criteria for mucoid degeneration of ACL.⁶

MRI findings	Arthroscopic findings
•Ill-defined ACL •Increased thickness (mucoid-ACL) compared to normal •High-intensity signal in all sequences; fibers are better seen on T2W (compared to T1W or PD sequences) •Normal orientation of the ACL - parallel to Blumensaat's line •"Celery stalk" appearance (T2W sequence)	•Intact ACL •Normal to thickened appearance •Mucoid material expressed with probing •Lack of smooth synovial lining