M12.2 - Villonodular synovitis (pigmented)
M12.22 - Villonodular synovitis (pigmented), elbow
M12.221 - Villonodular synovitis (pigmented), right elbow
M12.222 - Villonodular synovitis (pigmented), left elbow
M12.229 - Villonodular synovitis (pigmented), unspecified elbow