Maybe: Even knees that have never had acl reconstruction can pop. You should be concerned if the knee continues to hurt or feels in any way unstable like it did before you had the acl injury. You should also be concerned if the knee locks or feels as if it catches repeatedly.
Answered 3/17/2013
5.2k views
Lateral meniscus?: Could be a lateral meniscus tear or a piece of cartilage from the end of the femur. At any rate, if it persists for more than a week seek attention from an orthopedist.
Answered 8/18/2013
5.2k views
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