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Background  Diabetes mellitus ( DM ) is a common endocrinopathy in cats. No known diagnostic test or patient characteristic at the time of diagnosis can predict likely disease course, unlike in people in whom computed tomographic angiography ( CTA ) is used. No published data exist regarding the  CTA  appearance of the pancreas in cats with  DM , and thus, it is unknown what if any  CTA  variables should be further assessed for associations with pancreatic endocrine function.    Hypothesis/Objectives  A significant difference in pancreatic attenuation, volume, and size will be identified between normal cats and those with chronic  DM  on  CTA .    Animals  Ten healthy control cats and 15 cats with naturally occurring  DM  present for >12 months.    Methods  Prospective cross‐sectional study comparing pancreatic attenuation, enhancement pattern, size, volume, pancreatic volume‐to‐body weight ratio (V: BW ), pancreatic arterial: portal phase ratio (A:P), time‐to‐arterial enhancement, and time‐to‐peak portal enhancement on  CTA  between sedated healthy control cats and those with chronic  DM .    Results  The pancreas in cats with chronic  DM  was significantly larger, had higher volume, higher V: BW , and shorter time‐to‐peak portal enhancement on  CTA  when compared to normal cats.    Conclusions and Clinical Importance  Peak portal enhancement time, pancreatic size, pancreatic volume, and V: BW  can be used to differentiate normal sedated cats from those with chronic  DM  by  CTA . These variables warrant further investigation to identify possible associations with endocrine function.

Computed Tomographic Angiography of the Pancreas in Cats with Chronic Diabetes Mellitus Compared to Normal Cats