1. described a series of 60 patients of whom 59 had the adult type of polycystic kidney disease. The remaining patient was a newborn girl who died at the age of 6 months; necropsy showed bilateral polycystic kidneys and 'fatty infiltration of the liver'. Three other infants in the same sibship had died young. This family possibly accords with the neonatal group;Group, Neonatal;Oppenheimer,1934
2. described a pair of sibs, one of whom died at 11 days the other at 19 days. Both had cystic disease of the kidneys and liver, and one of them had cysts in the pancreas; there are good pathological descriptions but no illustrations. If these babies had the Childhood type of disease, they would probably both come into the infantile group because the kidneys were said to be only slightly enlarged and relatively few renal tubules were affected (mainly collecting tubules in the medulla). Factors such as prematurity no doubt contributed to their early demise;Group, Infantile;Bunting,1906
3. The three affected sibs, two of them identical twins, described in the paper by Campbell et;Group, Juvenile,1958
4. A Possible Group Milder than the Juvenile. A few families are recorded in which the affected members appear to have a disease similar to the Childhood type but of later onset and/or slower years. The 3rd affected child died before the age progression. Examples are to be found amongst of two from septicaemia, and necropsy showed 'the the patients described by Clermont et;al,1967