Causes 1 Primary renal diseases Primary glomerular diseases, Primary tubular diseases, Interstitial nephritis, et al 2 Secondary renal lesion Circulatory system diseases, immunity siseases, metabolic diseases, hematopathy, et al6 Causes: 1 Primary renal diseases Primary glomerular diseases, Primary tubular diseases, Interstitial nephritis, et al. 2 Secondary renal lesion Circulatory system diseases, immunity siseases, metabolic diseases, hematopathy, et al