This retrospective study compared imaging findings from 19 cats with confirmed neoplastic or hyperplastic pancreatic tumors. Definitive diagnosis was confirmed in all 19 cats via ultrasound-guided needle biopsy or aspiration, surgical biopsy, or necropsy. Fourteen cats had malignant pancreatic tumors; radiographic findings revealed an abdominal mass or mass effect and decreased serosal margin detail, suggesting abdominal effusion. None had evidence of pulmonary metastatic disease.The most common ultrasonographic finding was a pancreatic mass or nodule (8/14), ranging in size from 0.4 cm to 7.0 cm. Hypoechoic or mixed echogenicity was common. Lymphadenopathy and abdominal effusion were also noted (7/14). Five of 19 cats were diagnosed with adenomatous/nodular hyperplasia, the most common radiographic finding of which was an abdominal mass or mass effect. Findings on ultrasonography revealed multiple hypoechoic nodules, ranging in size from 0.3 cm to 1.0 cm. Pancreatic thickening, lymphadenopathy, and abdominal effusion were also noted. Neoplastic lesions tended to be single larger lesions, and nodular hyperplasia tended to present as multiple smaller lesions; however, overlap was found in both presentations. Funded by the Tufts Cummings School of Veterinary Medicine, Resident Research Fund of the Resident Section

COMMENTARY: This article is worth a read if you are interested in ultrasonography of the feline pancreas.There are nice descriptions of size and number of nodules that may correlate with certain pathologic conditions.Otherwise,the abstract includes the pertinent points.

Imaging findings in pancreatic neoplasia and nodular hyperplasia in 19 cats. Heicht S, Penninck DG, Keating JH.VET RADIOL ULTRASOUND 48:45-50, 2007.