Page 485 - Atlas of Small Animal CT and MRI

Small Airways and Parenchyma 475

Figure 4.6.19 Coccidioides immitis Mycotic Pneumonia (Canine) CT

(a) DX, LAT (b) DX, DV (c) CT, TP

(d) CT, TP (e) CT, TP (f) ES
7y MC Dachsund with progressive increase in respiratory effort, weight loss, and diminished activity of 1‐month duration. There is
consolidation of the entire left lung and coalescing alveolar infiltrates in the right lung on thoracic radiographs (a,b). On CT images, the
central tracheobronchial lymph node is markedly enlarged (c: arrow), causing compression and abaxial displacement of the mainstem
bronchi (c: arrowheads). The left lung is consolidated with persisting air bronchograms (d). Multifocal, partially coalescing, and poorly
margined alveolar infiltrates are present in the right lung lobes and appear to be centered on airways in many instances (e). On broncho-
scopic examination, the carina has an abnormal blunted shape, and mucosa appears inflamed with regions of frank hemorrhage (f).
Bronchoalveolar lavage cytology revealed pyogranulomatous inflammation, and a Coccidioides immitis titer was positive. Postmortem
examination confirmed disseminated pyogranulomatous pneumonia with numerous intralesional fungal spherules.

475