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(a)

(b)

Figure 3: Common Heart Tumors in Dogs. (a) Echocardiography showing a hyperechoic mass surrounding the aorta (Ao) at the base of the heart in short axis (top image) and long-axis (image below) views, consistent with a heart base tumor (chemodectoma). PA: pulmonary artery; RA: right atrium; LV: left ventricle; LA: left atrium. (b) Pathology specimen showing (black arrows) a right atrial tumor (hemangiosarcoma).