Abstract
This report describes exocrine pancreatic insufficiency in a yellow-naped Amazon (Amazona ochrocephala) with complete effacement of the pancreas by a pancreatic adenocarcinoma. The bird presented with a 3-month history of weight loss and voluminous, foul-smelling droppings. Clinically, routine hematologic findings were normal and fecal tests were performed to evaluate exocrine pancreatic function. The fecal function tests were positive for neutral and split fats and negative for trypsin. Oral administration of corn oil did not result in elevation of blood triglyceride levels. Two days later, the triglyceride tolerance test was repeated using corn oil mixed with pancreatic enzymes. This time, there was a 70% elevation of blood triglyceride levels. Because of a poor prognosis, the bird was euthanatized. At necropsy, the pancreas was diffusely enlarged, white, nodular, and firm. The liver contained multiple, 1-2-mm-diameter, randomly located, tan nodules. Microscopically, the pancreas was effaced by numerous lobules of neoplastic ductular structures surrounded by abundant fibrous connective tissue. In the liver, the hepatic parenchyma was replaced by multiple, well-demarcated, nonencapsulated foci of neoplastic tissue similar to that in the pancreas.