Vascular anomalies are disorders of abnormal vasculogenesis or lymphogenesis. All types of vascular anomalies may involve the airway, causing varying degrees of upper airway obstruction as well as dysphagia and bleeding. Certain signs and symptoms may implicate airway involvement with a hemangioma or vascular malformation. It is necessary to distinguish a vascular anomaly from other airway lesi...

During embryogenesis period, the ductus arteriosus originates from the sixth left aortic arch, acting as a vascular connection between the pulmonary artery and the descending aorta. After birth, the functional ductus arteriosus persistence characterizes the anomaly Persistent Ductus Arteriosus (PDA), which is an unusual condition in cats. At first, as a result of this anomaly, volume overload i...