Many recent studies have suggested multiple risk factors affecting postoperative surgical outcomes of PD; THE research is designed to determine the surgical outcomes of PD for periampullary tumour in high altitudes and normal altitude.~it is a multicenter study Aseer central hospital, Saudia and from Egypt two centers Mansoura university and el Menia university
Very few papers examine the effect of living at high altitudes on surgical results of major operations. This research is designed to determine the surgical outcomes of PD for periampullary tumour in high altitudes and normal altitudes.