“…The aetiology of discoid meniscus is controversial. In 1948, Smillie postulated that the discoid shape is normal in the developing embryo, (4,5) and that failure of absorption of the central portion, which persists during the fetal stage, leads to 'congenital discoid meniscus'. (5) In 1974, Weiner and Rosenberg attributed discoid meniscus to congenital changes in the tibia.…”