Nasal Cavity
If conchal detail is missing from
one side then this is the diseased side regardless of whether it is highly
opaque (exudate, blood, neoplasm) or lucent (usually fungal rhinitis).
Tooth
If this is eroded or missing, it indicates
a problem with the tooth.
Pharynx
The pharynx is evaluated for increased or
decreased contrast and displacement. Decreased contrast is a normal finding
in the brachiocephalic breeds, or can be due to the presence of inflammation
or masses. Increased contrast is due to air around the pharynx (retropharyngeal
air, e.g. due to penetrating wounds or rupture of the structures of the
oesophagus or pharynx). Ventral displacement can be due to retropharyngeal
masses. Laryngeal, tonsilar or thyroid masses can displace the pharynx
laterally. Fractures of the hyoid apparatus can cause caudal pharyngeal
displacement. The pharynges of brachiocephalic dogs can be difficult
to interpret because there is less air and so less contrast in the pharyngeal
region.
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