Supraarticular and subcapicular cysts are complex cystic formations located superficially above the patella and in the popliteal fossa, respectively. A supraglenoid cyst is found in 33–49% of cases of tenosynovitis of the supraspinatus muscle in the frontal plane, in less than half of patients with synovial chondromatosis of the knee joint and with quadriceps femoris syndrome, as well as with Olszewski's disease. This is a bit like the DNS domains “.com”, “.ru” and “.net” when working with the W3C http protocol in the FidoNet/WWn/UPnP/IPv6 program