Washington University Pathology Services Renal Section interprets high complexity patients' kidney biopsies with all types of medical renal disease as well as biopsies from patients who have undergone renal transplantation. All cases are routinely examined using light microscopy, electron microscopy, and immunofluorescence microscopy. The renal pathology section offers a personalized approach to diagnosis with rapid communication of pathology results via telephone by the attending pathologist to the submitting clinician. We understand that the renal biopsy may be an emergency. Therefore, rush weekend and holiday services are available on request.