Fig. 2

CT transverse image and 3D reconstruction of a 6-month-old Brown Swiss heifer calf with stylohyoid osteomyelitis (Calf 1). a Transverse CT image at the level of the stylohyoid bone. The distal left stylohyoid bone is partly distended and osteolytic (asterisk), there is an irregular gas inclusion within the abscess (white arrow head), moderate smooth and solid periosteal new bone formation ventromedially at the left mandible (black arrow head) and mild periosteal new bone formation at the pterygoid bone (black arrow). b 3D reconstruction of the hyoid apparatus viewed from the left. The distal left stylohyoid bone is partially expanded and osteolytic (asterisk) and the left epihyoid bone is missing. Bones of the right hyoid apparatus are numbered, 1 stylohyoid, 2 epihyoid, 3 ceratohyoid, 4 basihyoid, 5 thyrohyoid; not identified: tympanohyoid