Primary aorto-duodenal fistula.

Primary aorto-duodenal fistula is a rare and life-threatening cause of upper gastro-intestinal bleed. In this case report, a patient presented acutely with several episodes of haematochezia and pulseless lower limbs bilaterally. Primary aorto-duodenal fistula with peripheral vascular disease was diagnosed after an urgent CT angiogram was performed. She underwent left axillo-bifemoral bypass, resection of the fistula, Rouxen-Y gastro-jejunostomy, pyloric exclusion and controlled duodenal fistula the following day.