MRI just diagnosed with large through and through radial tear of the lateral aspect of the posterior horn of the medial meniscus adjacent to the root ligament representing an amputated meniscus. Additionally, there is a vertical tear extending to the superior articulating surface of the body. Early medial joint arthrosis, and small joint effusion. I am a 63 yr old female who has been dealing with this since August 20, 2013 when a large dog crashed into my right knee. Will arthroscopic surgery correct this completely. Am in constant, but manageable discomfort, more at night. Hesitate on surgery if it will not be of benefit as I am or was an active Grandma of 3 little boys.