D16 - Benign neoplasm of bone and articular cartilage
D16.2 - Benign neoplasm of long bones of lower limb
D16.20 - Benign neoplasm of long bones of unspecified lower limb
D16.21 - Benign neoplasm of long bones of right lower limb
D16.22 - Benign neoplasm of long bones of left lower limb