[Acquired renal cystic disease in patient on long-term hemodialysis (author's transl)].

We report two cases of acquired cystic disease of the kidneys in patients on long-term hemodialysis. The gross appearance of these polycystic kidneys can be distinguished from the congenital adult type by their normal size and weight and by the small range of their cysts. We found some similarity between these numerous cysts and the simple retention cysts. This polycystic disease could concern about 30 % of the whole patients on long-term hemodialysis ; the mechanisms of its development are unknown. Clinically, this lesion is mostly asymptomatic but could sometimes be discovered by intra or perirenal haemorrhage.