Mechanical problems in continuous ambulatory peritoneal dialysis (CAPD) can
result in ultrafiltration failure and disruption of CAPD therapy. The rece
ntly described tool of CT peritoneograpby with water-soluble contrast mediu
m has the disadvantage of radiation and instillation of nephrotoxic substan
ces. We report a child with a peritoneal leak diagnosed by MRI after instil
lation of a gadodiamide-dialysate mixture. This method provided good anatom
ical detail without radiation or nephrotoxic agents.