Table 3

Genetic conditions predisposing to aneurysm formation and subarachnoid haemorrhage

▸ Adult polycystic kidney disease
▸ Coarctation of the aorta
▸ Marfan’s syndrome
▸ Hereditary haemorrhagic telangectasia
▸ Ehlers–Danlos syndrome
▸ α1 Antitrypsin deficiency