[Chronic glomerulonephritis syndrome (CGNS)].

Chronic glomerulonephritis syndrome is one of clinical classification in primary glomerulonephritis. Clinical classification of primary glomerulonephritis consists of five groups. (WHO 1995) They are acute nephritic syndrome, rapidly progressive nephritic syndrome, recurrent or persistent hematuria (proteinuria), chronic nephritic syndrome, and nephrotic syndrome. After therapy or renal biopsy, they have interaction with one another and many cases are followed up as chronic glomerulonephritis. In the long term clinical course, it is most important thing that not to deteriorate renal function by therapies. (blood pressure control, low protein diet, salt restriction) If there are not only glomerular change but also interstitial and vessel changes in renal biopsy the prediction of prognosis will be poor so it will be necessary to administer medication under strict observation.