A 12-yr-old girl with end-stage renal disease secondary to primary hyperoxaluria type I received a living related (left lateral segment) liver transplant from her brother as the first step of a staged liver and kidney transplant. Renal transplantation was planned for a later date from the same donor. Nine weeks after transplantation she developed polymorphic PTLD of the tonsils and adenoids. Initial treatment with surgical resection and withdrawal of immunosuppression was insufficient as she developed recurrence of the PTLD lesion 1 wk after surgical resection and reduction of immunsuppression. Treatment with the chimeric monoclonal anti CD20 antibody, rituximab (Mabthera, Hoffman-La Roche AG, Grenzach-Whylen, Germany), resulted in quick response and complete recovery from PTLD within 2 wk, with no recurrence up to 8 months after treatment. Rejection prophylaxis was successfully achieved with Sirolimus (Rapamune, Wyeth Pharmaceuticals Inc., Philadelphia, PA, USA) monotherapy, with no episodes of acute rejection.
Congenital sodium diarrhea is a rare cause of secretory diarrhea due to a defect in the sodium/proton exchanger that results in decreased sodium absorption and increased excretion in stools. We report a pre-term baby boy with a birth weight of 1.4 kg who was referred because of rapidly rising serum urea and creatinine. The initially reported high urine output was later found to be severe watery diarrhea with severe oliguria and acute renal failure. Associated findings were normal anion gap metabolic acidosis with hyponatremia that required > 50 mmol/kg of sodium per day for correction and about 300 ml/kg per day of replacement fluid to correct fluid and electrolyte abnormalities. The patient continues to do well 5 months after diagnosis.
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