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Feline infection peritonitis (FIP), liver (L), cat. Hepatic parenchyma is effaced by a multifocal to coalescent mixed inflammatory infiltrate (arrows) with central necrosis (asterisks). Hematoxylin eosin stain. Inset: Immunohistochemistry shows intense brown cytoplasmic immunolabelling for feline CoV antigen within macrophages.
