Nasal septal thickening, horse
Courtesy of Dr. Bonnie R. Rush.
Dorsoventral radiographic projection of the nasal passage of a mare with nasal septal thickening. The margins of the rostral aspect of nasal septum are obscured by the dental arcade; in normal horses, the margins of the septum are visible axial to the dental arcades. The abnormal margins of the caudal septum can be identified overlying the nasopharyngeal region.