The analysis of biopsy specimens by a pathologist allows a precise diagnosis in the majority of cases. This diagnosis needs to be correlated with the relevant clinical information during a multidisciplinary board in order to yield an optimal clinicopathological diagnosis. The staging and the activity of the histological lesions described by the pathologist will significantly contribute to the modality of treatment and will help to estimate the course of the disease and eventually prepare the patient for dialysis and/or transplantation.