<s>[INST] hello sirs&mam, my husband fell down before 20 days while playing.his knee was instable and doctors took mri scan and reported ,tear of posterior root of lateral meniscus,marrow contusion noted in the mid portion of the lateral femoral condyle and posterior aspect of lateral and medial tibial condyles. they said  my hub should undergo a minor operation.Could you please explain about this and can it be cured without any surgery..THANKING U [/INST] HiYes, repair of ACL and meniscal surgery should be undertaken to avoid long term knee instability and pain,poor function and consequent osteoarthritis developing giving further damage.Till surgery is undertaken, wear a long knee brace and take advil and serratiopeptidase tabs etc which your doctor may prescribe </s>