[Microangiopathy of the diabetic type, without carbohydrate intolerance (author's transl)].

Pathophysiology of diabetic microangiopathy is unclear, but hyperglycemia is admitted as an important factor. In three patients having microangiopathy with lesions very similar to those of diabetes (one nodular glomerulosclerosis, two retinopathies), glucose tolerance was found normal. Such cases, already reported, but rather rare, raise the question of the validity of tests currently used in the diagnosis of diabetes, of the importance of hyperglycemia compared to others factors (specially genetic) in the occurrence of microangiopathy, and of the specificity of these lesions.