[Computertomographic findings in pigmented villonodular synovitis].

The CT findings in two patients with synovitis of the knee joint were analysed. Angiography is a non-specific method for the differential diagnosis of synovitis; CT, however, can be pathognomonic by showing a strikingly thick and hyperdense synovial membrane because of the iron content of the hyperplastic synovia. This is not found in non-specific synovitis.