Historically, infants with irreversible renal failure fared poorly, and aggressive medical intervention was considered futile. Although the care of this population clearly remains a challenge, technical advances and clinical experience have now made dialysis and transplantation reasonable and successful therapeutic options. This report provides a discussion of practical guidelines and patient care issues particular to the infant with end-stage renal disease. Topics addressed include nutritional requirements, neurodevelopmental abnormalities, and the possible contribution of alterations of the immune system to patient morbidity. Specific technical considerations for the performance of peritoneal dialysis, hemodialysis, and transplantation in the very small infant are also presented.