Etiology of CRF Parents are cousins Parents are from the same family Parents are from different families Number of patients Percentage Number of patients Percentage Number of patients Percentage *Congenital anomalies of the kidney 1 33.33% 1 33.33% 1 33.33% *Primary hyperoxaluria 6 100 % - - - -

Table 3: The degree of relativity between parents of CRF patients under 15 years old in Jenin District (Palestine).