Page 277 - Small Animal Internal Medicine, 6th Edition

CHAPTER 14 Diagnostic Tests for the Nasal Cavity and Paranasal Sinuses 249

BOX 14.1
VetBooks.ir Radiographic Signs of Common Nasal Diseases*

Feline Chronic Rhinosinusitis
Soft tissue opacity within nasal cavity, possibly
asymmetric
Mild turbinate lysis
Soft tissue opacity in frontal sinus(es)
Nasopharyngeal Polyp
Soft tissue opacity above soft palate
Soft tissue opacity within nasal cavity, usually unilateral
Mild turbinate lysis possible
Bulla osteitis: soft tissue opacity within bulla, thickening
of bone

Nasal Neoplasia
Soft tissue opacity, possibly asymmetric
Turbinate destruction
t
Vomer bone and/or facial bone destruction
t Soft tissue mass external to facial bones
Nasal Aspergillosis
Well-defined lucent areas within the nasal cavity
Increased radiolucency rostrally
Increased soft tissue opacity possibly also present
No destruction of vomer or facial bones, although signs
often bilateral
FIG 14.5 Vomer bone sometimes roughened
Positioning of a cat for open-mouth projection of the Fluid density within the frontal sinus; frontal bones
tympanic bullae. The beam (arrow) is aimed through the sometimes thickened or moth-eaten
mouth toward the base of the skull. Adhesive tape (t) is
holding the head and mandible in position. Cryptococcosis
Soft tissue opacity, possibly asymmetric
Turbinate lysis
Facial bone destruction
Soft tissue mass external to facial bones
Canine Chronic/Lymphoplasmacytic Rhinitis
Soft tissue opacity
Lysis of nasal turbinates, especially rostrally

Allergic Rhinitis
Increased soft tissue opacity
Mild turbinate lysis possible
Tooth Root Abscesses
Radiolucency adjacent to tooth roots, commonly apically
Foreign Bodies
Mineral and metallic dense foreign bodies readily
identified
FIG 14.6 Plant foreign bodies: focal, ill-defined, increased soft
Radiograph obtained from a cat with nasopharyngeal polyp tissue opacity
using the open-mouth projection demonstrated in Fig. 14.5. Lucent rim around abnormal tissue (rare)
The left bulla has thickening of bone and increased fluid
density, indicating bulla osteitis and probable extension of *Note that these descriptions represent typical cases and are not
the polyp. specific findings.