• J. Pediatr. Hematol. Oncol. · Dec 2003

    Case Reports

    Severe lactic acidosis due to thiamine deficiency in a patient with B-cell leukemia/lymphoma on total parenteral nutrition during high-dose methotrexate therapy.

    • Johanna Svahn, Maria Cristina Schiaffino, Ubaldo Caruso, Michaela Calvillo, Giuseppe Minniti, and Carlo Dufour.
    • Department of Pediatric Hematology/Oncology, G. Gaslini Children's Hospital, Genova, Italy. johannasvahn@hotmail.com
    • J. Pediatr. Hematol. Oncol. 2003 Dec 1; 25 (12): 965-8.

    AbstractAn 11-month-old girl with B-cell leukemia/lymphoma developed profound lethargy due to severe lactic acidosis during chemotherapy and total parenteral nutrition (TPN). Initial treatment with NaHCO3 was ineffective. Treatment with a vitamin cocktail (OH-cobalamin, pyridoxine, thiamine, riboflavine, biotin, carnitine) at pharmacologic doses rapidly improved the child's clinical and laboratory status. Lactic acidosis was caused by an impairment of pyruvate dehydrogenase complex, which was due to lack of its necessary cofactor thiamine in the TPN. This case report indicates that lactic acidosis may be a front-line diagnosis in patients on TPN with lethargy and outlines the need for monitoring thiamine supply in TPN.

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