Elevated preoperative plasma D-dimer level is an independent prognostic factor for pediatric patients with Wilms tumor.
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INTRODUCTION: Elevated plasma D-dimer levels are an unfavorable prognostic indicator for various tumors. However, its predictive value for prognosis in pediatric patients with Wilms tumor (WT) remains unknown. We aimed to investigate the clinical and prognostic value of preoperative plasma D-dimer levels and other clinicopathological characteristics in patients with favorable histology WT (FHWT). MATERIALS AND METHODS: The clinical data of 74 children with FHWT from January 2010 to January 2022 were retrospectively analyzed. The clinicopathologic characteristics, preoperative laboratory parameter results, including D-dimer level, and follow-up data were collected. Based on the postoperative recovery status, the patients were divided into tumor-free survival and disease progression groups. The risk factors affecting disease progression in pediatric patients with WT and the impact of plasma D-dimer levels on overall survival (OS) were evaluated. RESULTS: Over a median follow-up of 33 months (range: 2-145 months), 56 patients survived without progression. Relapses and metastases occurred in 18 patients, of which four survived and 14 died. Higher preoperative plasma D-dimer levels (>0.865) (Odds ratio [OR] = 7.240, 95% confidence interval (CI) = 1.276-33.272, P = 0.011) and tumor rupture (OR = 19.984, 95% CI = 1.182-338.013, P = 0.038) were independent prognostic factors for disease progression. Additionally, patients with elevated D-dimer levels demonstrated a worse 5-year OS than those with low D-dimer levels (Hazard ratio (HR) =4.278, 95% CI = 1.074-17.035, P = 0.039). CONCLUSIONS: Elevated D-dimer levels are a prognostic factor for a poorer outcome in pediatric patients with WT and are expected to become a clinical biomarker for predicting the prognosis of WT.