A large pelvic arteriovenous malformation in an adult patient with cystic fibrosis

We present a prepubertal male cystic fibrosis patient with high circulating oestrogen levels las a consequence of severe cystic-fibrosis-related hepat obiliary disease who subsequently developed a large pelvic arteriovenous ma lformation. This has not previously been described in patients with cystic fibrosis, despite the association between high oestrogen levels and arterio venous malformations. The aetiology and treatment options of arteriovenous malformations are discussed.