Spontaneous perirenal hematoma is an unusual but serious complication of tumors, vascular disease, ruptured cyst, or infection. The authors report the case of a diabetic patient who presented with spontaneous perirenal hematoma and who was subsequently diagnosed to have emphysematous pyelonephritis.

• Hyeon Seok Lee(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Jae Ho Park(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Bo Mi Park(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Ye Jin Kim(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Kang Ryun Moon(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Dae Eun Choi(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Ki Ryang Na(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Kang Wook Lee(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital)
• Young Tai Shin(Division of Nephrology, Department of Internal Medicine, Chungnam National University Hospital) Corresponding author