Page 276 - Small Animal Internal Medicine, 6th Edition

248 PART II Respiratory System Disorders

VetBooks.ir

FIG 14.1
Positioning of a dog for intraoral radiographs.

FIG 14.3
Positioning of a dog for frontal sinus radiographs. The
endotracheal and anesthetic tubes are displaced laterally in
this instance by taping them to an upright metal cylinder.

FIG 14.2
Intraoral radiograph of a cat with carcinoma. Normal fine
turbinate pattern is visible on the left side (L) of the nasal
cavity and provides a basis for comparison with the right
side (R). The turbinate pattern is less apparent on the right
side, and an area of turbinate lysis can be seen adjacent to
the first premolar.
with chronic inflammatory conditions of any etiology. Early
neoplastic changes can also be associated with an increase in
soft tissue density and destruction of the turbinates (see Figs.
14.2 and 14.4). More aggressive neoplastic changes may
include marked lysis or deformation of the vomer and/or
facial bones. Multiple, well-defined lytic zones within the
nasal cavity and increased radiolucency in the rostral portion
of the nasal cavity suggest aspergillosis (Fig. 14.7). The vomer FIG 14.4
bone may be roughened but is rarely destroyed. Previous Frontal sinus view of a dog with a nasal tumor. The left
traumatic fracture of the nasal bones and secondary osteo- frontal sinus (L) has increased soft tissue density compared
myelitis can also be detected radiographically. with the air-filled sinus on the right side (R).