 [ Symptoms ] sprained left ankle for a year and a half ligament injury synovitis with effusion [ Disease ] hi optimal treatment will be physical therapy + 6 month calcium and vit d supplement i know it may seem not convincing but you will be cured within 3 to 6 month i have personally treated many similar cases within 1 to 3 month with physical therapy notice that even after surgery you will need physical therapy pick a good physical therapist  good luck