[Chronic pyelonephritis in adults (author's transl)].

The frequency of chronic pyelonephritis is often overestimated. Chronic pyelonephritis is probably always a secondary disease in cases with obstructive changes in the ureters or other primary renal damage. The influence of chronic infection on the progression of renal insufficiency is still not well understood today. Underlying disease and infection should always be taken into consideration in the treatment of chronic pyelonephritis.