FIGURE 2.

Computed tomography study of the affected horse’s head. (a) Transverse image at the level of teeth 110 and 210. (b) Frontal image, parallel to the dorsal surface of the frontal bones, at the level of the ventral orbit. (c) Transverse close-up view of the sphenoidal sinus. Note the extensive bilateral fluid accumulation in the rostral and caudal maxillary sinuses, ventral and dorsal conchal sinuses, left sphenopalatine and left ethmoidal sinuses, with some fluid accumulations contained in partially mineralised walls.