After bypass, they occluded the parent vessel, in nine cases proximally, in four distally, and by aneurysm trapping in one case. ‘Where possible, we choose proximal vessel occlusion due to the theoretical advantage of reducing the risk of aneurysm rupture,’ they comment. ‘However, when publicity of the proximal inflow is bound, or there are critical branches arising from the proximal portion of the aneurysm, distal mother or father vessel occlusion is an option that can lead to aneurysm thrombosis and obliteration.’ After surgery, the bypass was patent in every but one individual, and the aneurysm was totally occluded in 12 patients. No affected individual died, but five had perioperative problems, with three having symptomatic infarctions, and two developing shunt-dependent hydrocephalus.It suggested that sufferers may delay seeking help for fresh or recurrent symptoms if they feel 'over-reassured' carrying out a previous false alarm or felt under-supported at the right time by the healthcare system. If sufferers felt unsupported and thought they had been treated dismissively, some had problems they might seem to be a hypochondriac or producing a fuss if they had long term symptoms checked out. Several studies also reported that insufficient description or advice at the time of the false alarm, on possible causes of the symptoms or another steps, left sufferers feeling that doctors could not help them, and unsure about what to do next. Lead writer Dr Cristina Renzi, a Cancers Research UK health expert at UCL, said: Individuals who go to their GP with symptoms are obviously relieved to discover that they don't have cancers.