Pseudopersistent urachus in a baby walrus.
D000818:Animals; D000836:Animals, Zoo; D010872:Caniformia; D006869:Hydronephrosis / Q000473:pathology / Q000662:veterinary; D007668:Kidney / Q000473:pathology; D008297:Male; D011704:Pyelonephritis / Q000473:pathology / Q000662:veterinary; D014497:Urachus; D014856:Walruses