title: Necrosis and rupture of the aorta and pulmonary trunk in four horses.
abstract: Four horses are described with rupture of the aortic arch and pulmonary trunk which resulted in a fistula between these vessels. Ruptures were located near the ligamentum arteriosum. Histological examination of the vessel walls revealed media necrosis which was probably due to intimal thickening and/or medial fibrosis of the vasa vasorum.
mesh_terms: D000818:Animals; D001011:Aorta / Q000473:pathology; D001019:Aortic Rupture / Q000473:pathology / Q000662:veterinary*; D005260:Female; D006734:Horse Diseases / Q000473:pathology*; D006736:Horses; D008297:Male; D009336:Necrosis; D011651:Pulmonary Artery / Q000473:pathology; D012422:Rupture, Spontaneous; D014651:Vasa Vasorum / Q000473:pathology; D014652:Vascular Diseases / Q000473:pathology / Q000662:veterinary