My MRI report states "multiple areas of bone marrow contusions of both condyls of femur and tibia bones with moderate size reactionary sinovial effusion, grade  2tear of acl and horizontal tear of prosterior horn of medial meniscus and grade 1 sprain of mcl". Do I require surgery? I've started doing quad exercises and ROM exercises at home from the last 5-6 days. I don't want to go under the knife. Please help.