Accurate diagnosis starts with the patient history, the mechanism of the injury and the physical examination.  Dr. Lowe will ask a series of questions to get an idea as to how your injury occurred and what symptoms that you are having.  He will then perform specific tests to try and determine the diagnosis.  Many times this alone will not reveal any injury to the meniscus.  An MRI may be ordered to help rule out a tear or other injury to the knee joint.