Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

212 Small Animal Radiolo g y and Ultrasono graphy
Fig. 2-194 A and B, An 11-year-old
spayed female Siamese cat with a
2-year history of chronic coughing.
The cough responded slightly to
treatment with antibiotics and cortisone.
Multiple nodules of varying
sizes are present throughout all lung
lobes. The right middle lobe is
atelectatic. The radiographic findings
are indicative of multiple softtissue
masses, which may be
neoplastic or granulomatous.
Aspiration of one of these nodules
revealed a granulomatous reaction
secondary to lipid material.
Diagnosis: Granulomas secondary
to aspiration of mineral oil.
A
B
some cases there may be a large mass and multiple small nodules. Infrequently, primary
neoplasia may appear as numerous, ill-defined, small- to medium-sized masses (Fig. 2-197).
Occasionally, calcification is identified radiographically within primary or metastatic
lung tumors. Small, amorphous calcification may be present within large neoplastic tissuedense
masses (Fig. 2-198).
Bronchoalveolar carcinoma may appear as a solitary nodule in the middle or peripheral
lung areas. However, a more common appearance is that of a poorly defined mass.
Radiographically apparent tracheobronchial lymphadenopathy is an uncommon finding
with primary or secondary lung tumors. When present, it is an unfavorable prognostic
sign. Tracheobronchial lymphadenopathy occurs most often in association with multicentric
lymphosarcoma or granulomatous disease.