Presentation
Dry, retching cough of 6 months duration. Initially treated with antibiotics, cough improved but was still intermittently present. In last three weeks progressed to coughing 2-3 times per hour, has improved to only 2-3 times a day with reinstitution of antibiotic therapy.
Patient Data
Three well defined, 2-3 cm soft tissue masses are observed on the right lateral and DV projections. Multiple smaller, poorly defined soft tissue nodules are also observed on the left lateral projection. There is a severe alveolar pattern in the dependent portion of the left caudal lung lobe.
Probable primary pulmonary neoplasia with intrapulmonary metastasis.
Case Discussion
Pulmonary bronchoalveolar carcinoma was diagnosed on histopathology
The abdominal ultrasound was normal. The larger mass in the left caudal lung lobe is most likely the primary tumor with metastasis to the other lung lobes. Carcinomas can cause ill-defined masses as well as diffuse interstitial metastases.
Differential diagnoses such as granulomatous disease are less common, and the age of the dog favors neoplasia.
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