Many hemodialysis patients from foreign countries arrived to be dialized in Madrid. They cames from all around the world, especially South America and Morroco. This group is younger (46.2 + 14.2 years) than the control group. Most of them initiated dialysis without a previous Nephrological check-up (62 %). In the foreign group the primary renal diseases were similar to the control group, however they also had many other health unusual problems. Most of them (71 %) started hemodialysis without ever having permanent hemodialysis vascular access, and 25 % were not able to speak spanish, or other European languages. This caused many problems in administering correct treatment.