Renal thromboembolism from a large pulmonary artery to a pulmonary vein fistula in an asymptomatic adolescent.

Pulmonary arteriovenous fistula is a rare vascular anomaly that can cause significant morbidity and mortality. The presence and significance of symptoms are dependent on the size of the right-to-left shunt. Thromboembolic events may result in cerebrovascular accidents or systemic vascular occlusions. We present a case of an adolescent without cardiorespiratory symptoms, who developed flank pain due to renal infarction, followed by a brief literature review.