Liver graft as a ‘Trojan horse’: manifestation of variegate porphyria in an 11-month-old girl with biliary atresia after living-related liver transplantation

We report on an infant girl with biliary atresia, who, at the age of 6 months, received a living-related liver transplantation (LRLT), (segments II/III) from her 37-year-old healthy mother. Five months after LRLT, the child developed skin lesions on sunlight exposed skin areas. Based on plasma fluorescence scanning, biochemical findings and DNA testing variegate porphyria (VP) was diagnosed in the girl. In this remarkable case hepatic heme synthesis was induced in the transplanted liver through medication (metamizole), stress and infection (cholangitis), unmasking previously undiscovered partial enzyme deficiency of PPOX. LRLT with subsequent manifestation of heterozygous VP in very early childhood has not been described hitherto. Our report will increase awareness of "rare risks" for "rare diseases" in liver transplantation.