title: Congenital malformation/absence of the left fourth aortic arch in a dog.
authors: Veterinary School, University of Sydney, New South Wales.
authors: P R
authors: PR
authors: Hopwood
authors: T L
authors: TL
authors: Rothwell
authors: R C
authors: RC
authors: Ratcliffe
mesh_terms: D000015:Abnormalities, Multiple / Q000662:veterinary*; D000818:Animals; D001013:Aorta, Thoracic / Q000002:abnormalities*; D004283:Dog Diseases / Q000151:congenital*; D004285:Dogs; D005260:Female; D006330:Heart Defects, Congenital / Q000662:veterinary; D013116:Spinal Cord / Q000002:abnormalities*