To establish a multi-relational database to include data on renal transplantation patients' HLA results, panel reactive antibodies (PRA), antibody crossmatching, blood transfusions and cytokine gene polymorphisms, we designed a database using a Microsoft office application, Access (R). Accordingly, any combination of the results' tables can be obtained in one single table. We believe that Access (R) is a good tool to organize the collected data on renal transplant patients and may serve to obtain fast reports on patients and enhance research.