MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear

Journal of Experimental Orthopaedics

Table 3 Distribution of MM degenerative grade at each 4 portion in MMPRT + and MMPRT-

	MMPRT +					MMPRT-
Degeneration grading (0-4^a) Portion	0%	1	2	3	4	0	1	2	3	4
Anteromedial	6.3	20.8	66.7	6.3	0	18.4	22.3	59.2	0	0
Medial	0	4.2	70.8	16.7	8.3	7.8	6.8	55.3	25.2	3.9
Posteromedial	0	0	47.9	31.3	20.8	0	0	45.6	26.2	27.2
Posterior	0	0	52.1	39.6	8.3	0	0	48.5	35.0	15.5

MM medial meniscus, MMME medial meniscus medial extrusion, MMPE medial meniscus posterior extrusion
^aMeniscus degeneration graded according Jerosch et al. ¹⁷⁾