A case of a nine-year-old, intact female, American Bulldog with a heart mass is described. Echocardiography was used to identify this pathological lesion. Part of the mass and pericardial sac were surgically removed for histopathological examination. A final diagnosis of neuroendocrine carcinoma was diagnosed by necropsy and histopathology. To the author's knowledge, there is very limited information in the literature about this pathology.

Department of Pathological Morphology and Parasitology Faculty of Veterinary Medicine University of Veterinary Sciences Brno Czech Republic

Small Animal Clinic Faculty of Veterinary Medicine University of Veterinary Sciences Brno Czech Republic

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