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<p>We conducted a retrospective, single-center, observational cohort study in patients with inappropriate secretion of antidiuretic hormone syndrome (SIADH) induced by high-dose thiotepa during conditioning for allogeneic stem cell transplantation (allo-HSCT). Between May 2018 and December 2023, 431 patients underwent allo-HSCT. All patients who developed SIADH had received TBF conditioning, and the incidence of SIADH among TBF-treated patients was 7.3%. Despite its limitations as a retrospective study, this real-life analysis shows that hyponatremia with corresponding serum hypo-osmolality and persistent urinary sodium excretion is compatible with a diagnosis of SIADH in the presence of normovolemia. Fluid balance and electrolyte levels should be closely monitored during conditioning to ensure prompt detection of SIADH promptly and enable immediate treatment.</p>

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High-dose thiotepa may induce inappropriate secretion of antidiuretic hormone syndrome (SIADH) during conditioning treatment for allogeneic stem cell transplantation

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Maria Assunta Limongiello,
  • Elisabetta Metafuni,
  • Sabrina Giammarco,
  • Eugenio Galli,
  • Federica Sorà,
  • Francesco Autore,
  • Silvia Baroni,
  • Patrizia Chiusolo,
  • Simona Sica

摘要

We conducted a retrospective, single-center, observational cohort study in patients with inappropriate secretion of antidiuretic hormone syndrome (SIADH) induced by high-dose thiotepa during conditioning for allogeneic stem cell transplantation (allo-HSCT). Between May 2018 and December 2023, 431 patients underwent allo-HSCT. All patients who developed SIADH had received TBF conditioning, and the incidence of SIADH among TBF-treated patients was 7.3%. Despite its limitations as a retrospective study, this real-life analysis shows that hyponatremia with corresponding serum hypo-osmolality and persistent urinary sodium excretion is compatible with a diagnosis of SIADH in the presence of normovolemia. Fluid balance and electrolyte levels should be closely monitored during conditioning to ensure prompt detection of SIADH promptly and enable immediate treatment.