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'[[Tumors]] that develop within the [[liver]] may be either [[benign]] (noncancerous) or [[malignant]] (cancerous). Tumors can start in the liver, or spread to the liver from another cancer in the body. Malignant liver tumors have been reported to [[metastasize]] to other organs such as regional lymph nodes, lungs, kidneys, pancreas, spleen and others. ==Signs and symptoms== Clinical signs are often vague and include weight loss, loss of appetite, fatigue, and possible jaundice. ==Diagnosis== [[Medical imaging]] techniques such as [[X-rays]], [[Medical ultrasonography|ultrasound]], [[computed tomography]] (CT), and [[magnetic resonance imaging]] (MRI) are often used in evaluating animals with suspected liver tumors. Ultrasound-guided fine-needle aspiration or needle-core [[Liver biopsy|biopsy of liver]] masses is a useful diagnostic tools that are minimally invasive to obtain samples for [[Histopathology|histopathological]] analysis.<ref name=MacEwan_2001>{{cite book|author=Withrow SJ, MacEwen EG, eds |title=Small Animal Clinical Oncology|edition=3rd ed.|publisher=W.B. Saunders Company |year=2001}}</ref> ==Treatment== Surgical treatment is recommended for cats and dogs diagnosed with primary liver tumors but not [[metastasis]] to the liver. There are not many treatment options for animals who have multiple liver lobes affected. ==References== {{Reflist}} ==External links== *[http://www.petcancercenter.org/Cancer_Types_liver.html'' Liver Cancer in Cats and Dogs'' from Pet Cancer Center] *[http://www.petplace.com/dogs/hepatic-neoplasia-liver-tumors-in-dogs/page1.aspx ''Liver Tumors in Dogs'' from Pet Place'] *[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/22820.htm&word=hepatic%2cneoplasia ''Hepatic Neoplasia'' from Merck Veterinary Manual'] *[http://www.vetsurgerycentral.com/liver_tumors.htm ''Liver Tumors'' from Vet Surgery Central] [[Category:Dog diseases]] [[Category:Cat diseases]]'