Necrotizing pulmonary arteritis in a dog with peritoneo-pericardial diaphragmatic hernia

A 4-month-old male, miniature Schnauzer had dyspnoea of 4 days duration, cyanosis, grade II/VI systolic murmur and jugular pulse. The presence of intestinal loops in the pericardial sac was detected by radiography. Repair of the peritoneo-pericardial diaphragmatic hernia did not improve the clinical condition of the puppy, which died on the day of surgery. Pulmonary arterial medial hypertrophy, necrotizing pulmonary arteritis, and right ventricular hypertrophy were diagnosed post mortem.