[Kidney biopsy in the differential diagnostic clarification of renal diseases in diabetic patients].

The diagnosis of arteriosclerosis is simple. The chronic pyelonephritis, however, is in most cases not clearly to be diagnosed, but only with a certain probability. To the glomerulosclerosis is applied that conspicuous findings allow of a doubtless diagnosis. But not in the least seldom there exist certain difficulties, above all in the initial stage and in the clear limitation to glomerulonephritis. In the majority of these cases the modern morphologic investigation methods lead to a clarification, but also the exact anamnestic and clinical data may be very useful for a probability diagnosis.