An unusual solitary endobronchial pulmonary arteriovenous malformation in a 10 year-old child.

Pulmonary arteriovenous malformations (PAVMs) are relatively rare in children. They may occur both as single isolated anomalies and, much more commonly, as one of many widely distributed arteriovenous malformations (AVMs) in other organs and anatomic locations such as the liver, brain, nose and spine. The latter phenotypically defines the condition known as Hemorrhagic Hereditary Telengiectasia (HHT).