I. Hematuria with or without proteinuria

1. Primary glomerular diseases
   1. Berger’s disease (IgA nephropathy)^a
   2. Mesangiocapillary glomerulonephritis
   3. Other primary glomerular hematurias accompanied by “pure” mesangial proliferation, focal and segmental proliferative glomerulonephritis, or other lesions
   4. “Thin basement membrane” disease (? forme fruste of Alport’s syndrome)
2. Associated with multisystem or hereditary diseases
   1. Alport’s syndrome and other “benign” familial hematurias
   2. Fabry’s disease
   3. Sickle cell disease
3. Associated with infections
   1. Resolving poststreptococcal glomerulonephritis
   2. Other postinfectious glomerulonephritides

II. Isolated nonnephrotic proteinuria

1. Primary glomerular diseases
   1. “Orthostatic” proteinuria
   2. Focal and segmental glomerulosclerosis
   3. Membranous glomerulonephritis
2. Associated with multisystem or heredofamilial diseases
   1. Diabetes mellitus
   2. Amyloidosis
   3. Nail-patella syndrome