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Meniscus total scores and grades for menisci (anterior and posterior) were obtained using the new grading system in this study for A) C57BL/6J normal aging mice (asterisk = P < 0.05 versus 6-month-old mice) and B) surgically-induced OA mice (DMM model). C) Meniscus total scores were compared with articular cartilage scoring by OARSI method. D) Frequency counts of hypertrophy, cyst and ossicle formation in anterior meniscus showing increased incidences with aging.
