Today's Veterinary Practice

MAY-JUN 2018

Today's Veterinary Practice provides comprehensive information to keep every small animal practitioner up to date on companion animal medicine and surgery as well as practice building and management.

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PEER REVIEWED 62 IMAGING ESSENTIALS Age-Related Variations As cats age, the pancreatic ductal diameter can measure up to 2.5 mm without evidence of pancreatic disease ( FIGURE 8 ). Additionally, in older cats −and to a lesser extent, dogs− nodular hyperplasia can be present with focal hypoechoic nodules (3−10 mm) being noted within the pancreas ( FIGURE 9 ). 3,4 FIGURE 6. Dorsal CT image from the abdomen and caudal thorax of a cat with chylous pleural effusion ( PE ) (the cranial aspect of the patient is at the top of the image, and the left side of the patient is on the right side of the image) ( A ). The body and left lobe of the pancreas ( red arrows ) are located ventral to the portal vein ( PV ). Oblique imaging plane (long axis) ultrasound image of a normal cat with a hypoechoic left lobe of the pancreas ( white arrows ) and hyperechoic surrounding mesentery ( B ). The pancreas measures 6 mm in thickness and the pancreatic duct ( PD ) measures 1.7 mm in diameter, both of which are considered normal for a cat. ST , stomach; SP , spleen; PV , splenic portal vein dorsal to the left lobe of the pancreas. A B FIGURE 7. Dorsal plane CT image from a dog where the right, body, and left lobes of the pancreas are visualized. The pancreas is the horseshoe structure indicated by the white arrow . ST , fundus of the stomach; PY , pyloric antrum; DU , duodenum; TC , transverse colon. FIGURE 8. Pancreatic ductal dilation ( PD ) in an older cat without clinical or biochemical evidence of pancreatic disease. The pancreas is hypoechoic to the surrounding mesentery, and the overall pancreatic thickness is 7 mm. The ductal diameter is 2.2 mm, which is still within normal limits in a geriatric cat.

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