Table 1.

Study Inclusion and Exclusion Criteria ^a

Inclusion Criteria

Exclusion Criteria

– Clinical studies – Studies with comparative data on MME of the knee – Studies that only included data from nonoperative or preoperative knees

– Studies with no comparative data – Studies that did not utilize MRI to evaluate medial meniscal extrusions – Biomechanical studies – Cadaveric studies – In vitro studies – Animal studies – Review articles, case reports, conference papers, and letters that do not contain original data – Non–English-language articles – Unpublished studies – Studies in which patients received prior surgical treatment before imaging – Studies with an NOS score <7

^a MME, medial meniscal extrusion; MRI, magnetic resonance imaging; NOS, Newcastle-Ottawa Scale.