“…Glucosuria was found with a blood sugar 1 10 mg/100 ml or lower (venous blood, Folin-Wu), and heredity was found in 32 yo, if for diabetes mellitus or for renal glucosuria not known, compared with 5.2 % for a control material. Renal glucosuria will not develop into diabetes mellitus (3,20,21,33), although the coincidence of dia-betes mellitus and renal glucosuria has been described (9,25,34).…”