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Abstract
Hepatic biliary cystadenoma is a well-delineated neoplasm in some domestic animals, especially in cats, but it has not been reported in equines. We report on a case of hepatic biliary tumor, incidentally found in a 10-year-old horse, with gross and microscopic features similar to those observed in biliary adenofibroma of humans. The tumor presented as a solid mass measuring 16 cm in diameter and histologically was composed of complex tubulocystic biliary components embedded in an abundant fibrotic stroma. We regarded this tumor as a morphological variant of biliary cystadenoma of domestic animals. Differential diagnoses from other hepatic biliary tumor-like and tumor lesions are provided.
Key words: Adenofibroma; cystadenoma; equine; liver.
Request reprints from Prof. Gaetano Magro, Department F.G. Ingrassia, Section Anatomic Pathology, University of Catania, via S. Sofia no 87, 95123 Catania (Italy). E-mail: gaetano.magro{at}tiscalinet.it.
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