Canine Hepatic Neoplasia Study Guide

Overview and Clinical Importance

Hepatic neoplasia encompasses both primary and metastatic tumors affecting the liver in dogs. While primary liver tumors are relatively uncommon, representing only approximately 1.5% to 2.6% of all canine neoplasms, they carry significant clinical importance due to their variable prognosis and the liver's critical metabolic functions. Metastatic liver disease is approximately 2.5 times more common than primary hepatic tumors, making differentiation essential for treatment planning.

The liver's unique dual blood supply from the hepatic artery and portal vein makes it a common site for metastatic spread from gastrointestinal, pancreatic, splenic, and other primary tumors.

Classification of Hepatic Neoplasia

Hepatic tumors are classified based on their origin (primary vs. metastatic) and their morphologic pattern (massive, nodular, or diffuse).