Pulmonary arteriovenous (AV) malformations occur sporadically and in t
he pediatric population are most commonly associated with hereditary h
emorrhagic telangiectasia. Hemoptysis is an infrequent presentation in
this age group. Pulmonary angiography is considered to be the definit
ive diagnostic modality. The authors describe an otherwise healthy ele
ven-year-old girl who presented with massive hemoptysis secondary to a
large bronchial AV malformation unrelated to any congenital anomalies
. The pulmonary angiogram appeared normal and the diagnosis was establ
ished by digital subtraction aortography. Successful embolotherapy was
performed by selective injection of polyvinyl alcohol particles into
the culprit bronchial artery.