https://www.vetsurgeon.org/f/clinical-questions/25730/unusual-liver-tumour On examination of a 5 year old male neutered DSH presented for its annual vaccination 2 weeks ago I found a mass in its cranial ventral abdomen. The cat was showing no signs of illness. Ultrasound scan showed the mass to be 6cm diameter, and consistingen-USTelligent Community 10https://www.vetsurgeon.org/thread/178975?ContentTypeID=1Tue, 16 May 2017 11:52:18 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:b97f78e9-2e44-483e-85bb-5ca5bf7d7d41Thomas Johnson<p>Here is the histopathology report:</p> <p>In these sections of hepatic tissue there is focally-extensive distortion of the normal architecture by multiple cysts of variable size and shape. They are lined by attenuated to cuboidal epithelium exhibiting minimal atypia and contain eosinophilic non-biliary secretory product. The intervening parenchyma is congested and there is extensive fibrosis with atrophy of hepatocellular cords. Inflammation is not prominent. There is variable haemorrhage and fibrin exudation associated with this lesion. Where adjacent hepatic parenchyma remains, there is distortion, caused by compression. Mild, multifocal nodular regeneration of hepatocytes is seen and, in the portal tracts there is mild biliary and vascular proliferation.</p> <p>The histopathology is consistent with a diagnosis of biliary cysts. The cysts no longer have a direct association with hepatocytes, explaining the apparent non-biliary nature of any secretion that was present. Cystic disease of the feline liver is thought to be a congenital anomaly. This is often an incidental finding but may be progressive. The lesion can be associated with renal cysts (polycystic disease), and there may also be concurrent abnormalities of the hepatic vasculature. In this case no cause is evident in the sections examined. The lesions are typically dramatic visually, but in themselves are often of little or no pathological significance. Compression, biliary proliferation and vascular proliferation present in the surrounding hepatic parenchyma are likely a result of the presence of the biliary cysts.</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/178747?ContentTypeID=1Wed, 10 May 2017 21:20:12 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:ea9620f4-a526-47db-a62c-3860f5fdf2b3Lou Dawson<p>Biliary cystadenomas are reasonably common incidental findings in cats and look somewhat similar but I&#39;ve not seen one that big, I don&#39;t think. Please let us know when you have the histo!&nbsp;</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/178738?ContentTypeID=1Wed, 10 May 2017 19:02:52 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:a7846a1d-eb0a-4f4a-ad9c-f19baac7bfb6Linda Filshie<p>Plus one for tapeworm cyst</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/178732?ContentTypeID=1Wed, 10 May 2017 17:44:35 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:2bc847a8-b8ad-4972-849a-89645b6af6ccSarah Keir<p>Tapeworm cysts on livers of small rodents that my cat eats!</p><div style="clear:both;"></div>