Diabetic glomerulosclerosis without diabetes mellitus--two case reports and a review of the literature.

The duration of diabetes mellitus and presence of hyperglycaemia appear to be important in the development of diabetic nephropathy. The presence of nodular glomerulosclerosis is thought to be pathognomonic of the condition. We report two patients with histological features of diabetic glomerulosclerosis who did not have diabetes mellitus. The discussion reviews the literature and concludes that diabetic glomerulosclerosis with normal glucose tolerance is very rare and that most cases are due to overt diabetes mellitus or a degree of glucose intolerance. However, cases with only minimal glucose intolerance suggest that factor(s) other than hyperglycaemia are responsible for diabetic renal damage.