Summary: | This paper describes the diagnosis and treatment of a 5-year-old Standard Schnauzer dog admitted to the clinic due to a liver failure
and chronic bloody diarrhea. Based on the initial examination, no diagnosis could be made, therefore an endoscopic examination of
the gastrointestinal tract was performed. The endoscopy revealed a tumor within the ostium ileocaecocolicum. Unfortunately, shortly
after this procedure, a massive hemorrhage occurred, which led to the animal"s death. The necropsy confirmed the presence of the
tumor. The histopathological and immunohistochemical results of the collected specimens showed a neuroendocrine tumor (NET G1)
of the large intestine. In conclusion, gastrointestinal carcinoids in dogs are relatively rare and often misdiagnosed due to complex or
non-specific symptomatology.
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