AbstractThe authors have previously reported on the possibility of using the detection of crystalluria of 2, 8‐dihydroxyadenine as a screening test for the early discovery of congenital adenine phosphoribosytransferase deficiency.Since the amount of adenine in urine was determined by high performance liquid chromatography and hyperadeninuria in a girl patient with this disease was definitely recognized, it is concluded that the detection of crystalluria of 2,8‐dihydroxyadenine as a primary screening test and the demonstration of hyperadeninuria as a secondary screening are helpful in an early detection of this disease.The authors would like to propose this disease be designated a “Adenine‐body Urine Disease,” since adenine bodies such as adenine and 2,8‐dihydroxyadenine are excreted into the urine in la