Medial Shelf Disorder (Sakakibara Classification, D Type)

Though it is easy to resect the medial shelf, it is dificult to make a correct diagnosis for the shelf disorder.Arthroscopic shelf resection for the D type medial shelf was performed on 13 knees of 13 patients.Based on these arthroscopic and clinical findings, the cause of poor results after shelf operation was discussed.Our conclusions are:1. It is very difficult to make a clinical diagnosis before operation.2. Its seems that misdiagnosis is often the cause of poor results.