Abnormal anastomosis of peripheral pulmonary arteries, initially suspected to be an arteriovenous fistula, in an adult with Williams syndrome

Abstract

Key message Abnormal anastomosis of peripheral pulmonary arteries is rare and resembles a pulmonary arteriovenous fistula; thus, when the inflow or outflow route cannot be clearly identified in a suspected pulmonary arteriovenous fistula, the possibility of peripheral pulmonary artery anastomosis should be considered. However, the final diagnosis requires a catheterization study.