M65.8 - Other synovitis and tenosynovitis
M65.86 - Other synovitis and tenosynovitis, lower leg
M65.861 - Other synovitis and tenosynovitis, right lower leg
M65.862 - Other synovitis and tenosynovitis, left lower leg
M65.869 - Other synovitis and tenosynovitis, unspecified lower leg