VEGFA and hereditary hemorrhagic telangiectasia: The expression of the angiogenic growth factors VEGF and bFGF was found to be increased in samples of angiodysplastic tissue isolated from patients presenting with angiodysplasia.40,41 Also, increased plasma levels of VEGF have been reported in patients with hereditary haemorrhagic telangectasia (HHT), who present with multiple angiodysplastic lesions,42 and patients with genetic or acquired VWD43 (see below).