Meniscus is the cartilage that cushions the space between the bones in the knee. It transmits weight from thigh bone to leg bone and gives stability to the knee. Torn meniscus causes knee pain, recurrent effusion, catching, locking, instability and early osteoarthritis of the knee. Arthroscopy is done for repair or partial removal of  torn meniscus. Arthroscopic debridement, saucerization and reshaping  are the good treatment for the congenital discoid meniscus.