Brief Answer: Yes you need arthroscopic meniscus repair Detailed Answer: Hello, Thanks for writing to us, I have studied your case with diligence. Yes, you need arthroscopic meniscus repair and if ACL is lax/torn you may need to do ACL reconstruction. Tightening of ACL may not be possible. So fresh graft for ACL can be used from other leg, use of endobutton will give good results. At young age if you don’t operate for ACL then progression of knee arthritis will be rapid as your knee is not mechanically stable. You need to do proper physiotherapy protocol before and after surgery to strengthen your quadriceps and hamstring muscles. Knee support like knee cap or hinged knee brace will be helpful, So you should do arthroscopic meniscus and if ACL is torn/lax then that also. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care.