This protocol is designed for screening of patients with renal failure and/or diabetes who may be eligible for kidney, kidney-pancreas, or islet cell transplantation. Its purpose is to allow detailed investigation into the renal and endocrine function of these patients, and the status of other organ systems that would determine their ability to safely tolerate specific aspects of other therapeutic research protocols. After completion of this screening process, the patient will either be offered a chance to participate in an active treatment protocol, or if no appropriate protocol is identified, will have recommendations for other treatment options relayed to the primary or referring physicians.

• INCLUSION CRITERIA:

Patients will be entered on this protocol at the time of their first visit to the NIH Clinical Center Outpatient Clinic or Inpatient Services if:

The patient carries the diagnosis of a disorder for which the Transplant Branch has active research interest, and based on information received from an outside physician, they meet preliminary eligibility criteria for other specific research protocols.

The patient or the patient's guardian is capable of providing informed consent, and signs the informed consent after initial counseling by clinical staff. Separate consent forms for all interventional procedures will be obtained after explanation of the specific procedure.

EXCLUSION CRITERIA:

History of known malignancies except basal cell carcinoma of the skin.

Inability to give legal informed consent by self or legal guardian.

Inability or willingness to comply with protocol monitoring and therapy, including, among others, a history of noncompliance, circumstances where compliance with protocol requirements is not feasible due to living conditions, travel restrictions, access to urgent medical services, or access to anti-rejection drugs after the research protocol is completed.