We have experienced seven cases of the lesion of the adipose tissue in the knee joint, in each of which an operation was performed.
Particularly we have examined three cases, in the first of which a pedunculated solitary lipoma, located on the medial meniscus, was found to be the cause of internal derangement. The second was a case of a lobulated, pedunculated intra-articular lipoma in the lateral suprapatellar pouch, which was preoperatively diagnosed an injury of lateral meniscus. The third was deonstrated to be a case of snapping knee due to impinging of a hypertrophied infrapatellar fat pad in a rheumatoid knee.