“…In United States, approximately 20% of those with ACDK will have RCC 5 . In Japan, Terasawa et al 4 , Satoh et al 29 and Kojima et al 11 reported 2.6% (41/ 1603), 0.61% (38/6201) and 1.68% (44/2624) of RCC in their patients on hemodialysis,respectively. Such an incidence of RCC appears significantly high, compared with that reported in the general Japanese population where RCC develops in 7.1 of 100000 men and 3.1 of 100000 women, and age-standardized incidence rates per 100 000 population for men and women were 4.9 and 1.8, respectively 30 .…”