A 9-year-old, intact female, Pungsan dog was referred for purulent vaginal discharge and depression. Abdominal radiographs revealed gas-filled and soft tissue opacity tubular structures in the mid to caudal abdomen. On ultrasonography, fluid-filled uterus and cervix accompanied by hyperechoic foci and reverberation artifacts were identified. Multiple hyperechoic foci were found within the uterine wall, indicating gas content. Escherichia coli was isolated from aerobic and anaerobic bacterial cultures. Radiological differential diagnosis of tubular shaped, dilated gas-filled structure, and gas in the wall of the structure should consider emphysematous pyometra with endometrial pneumatosis in intact female dogs with vulvar discharge.

• Soyon An(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Jongbong Lee(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Gunha Hwang(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Jeongmin Ryu(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Jiwon Yoon(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Minji Kim(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Hee Chun Lee(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
• Tae Sung Hwang(Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) Corresponding author