HistoryAn 11-year-old castrated male domestic longhair cat was evaluated for metastatic disease. The cat was being treated for osteomyelitis of the left side of the mandible, and a proliferative sublingual mass had been detected during physical examination. The cat had been anorectic for 3 to 4 days. No abnormalities were detected during auscultation of the thorax. Radiographs of the thorax were obtained during general anesthesia (Figure 1).Determine whether additional imaging studies are required, or make your diagnosis from Figure 1-then turn the page * * Figure 1-Lateral (A) and ventrodorsal (B) radiographic views of the thorax of an 11-year-old cat with a history of a proliferative sublingual mass and osteomyelitis of the left side of the mandible.