I am unable to make a specific diagnosis based on the information that you present. Kidney disease can be very silent and not apparent until someone is very ill. It is not uncommon for kidney disease to present at a very late stage, but dialysis should have been available for treatment in 1972, if this is the only cause of death. So, I would have to conclude that there was more than kidney disease alone that was responsible for death. In 1972, dialysis would have been available, but very expensive. Medicare coverage of dialysis was not available at that time.