A 4-day-old, male Poodle dog was presented with dull, depressed and exhausted activity after the birth. On physical examination, the puppy showed arthrogryposis, muscular atrophy and no movement of hindlimbs. Palpation on dorsum revealed an absence of lumbar and sacral vertebrae. On prenatal and postnatal radiography, lumbar vertebrae, sacrum and coccygeal vertebrae were not visualized. On ultrasonography, bilateral kidney and urinary bladder were observed. On computed tomography, there were no apparent abnormalities in the forelimbs, cervical vertebrae or head, while lumbar vertebrae, sacrum and coccygeal vertebrae were not observed. At necropsy examination, the liver, stomach, intestine, kidney and urinary bladder were normal. This congenital anomaly was consistent with Perosomus elumbis. Perosomus elumbis in dogs is a rare condition of unknown etiology. In this report, Perosomus elumbis was evaluated with radiography, ultrasound and computed tomography.

• Sooyoung Choi(College of Veterinary Medicine, Chungnam National University)
• Byungho Lee(College of Veterinary Medicine, Chungnam National University)
• Byungdon Lee(Techno Well Animal Hospital, Daejeon 34017)
• Jiwon Seo(College of Veterinary Medicine, Chungnam National University)
• Hyunyoung Park(College of Veterinary Medicine, Chungnam National University)
• Kyunghun Kwon(College of Veterinary Medicine, Chungnam National University)
• Youngwon Lee(College of Veterinary Medicine, Chungnam National University)
• Hojung Choi(College of Veterinary Medicine, Chungnam National University)