| Abstract |
A 5‐year‐old, captive bred, 327 g female ornate bichir (Polypterus ornatipinnis) presented with a history of reduced appetite and cranial coelomic swelling. On physical examination, the swelling was smooth, soft, devoid of masses and consistent with an enlarged stomach. No other abnormalities were detected. Eleven months later, the bichir was found deceased in its aquarium and was diagnosed with pyloric hyperplasia with stenosis on postmortem examination. On histopathology, the pyloric mucosa appeared thickened with no signs of infiltrative disease. Outflow obstructions are rare in fish and are infrequently reported. This is the first report of a gastric outflow obstruction due to pyloric hyperplasia in a fish species. |
, William C. Rosenthal 
