LAUSR

PURPOSE The aim of this study was to evaluate the prognostic value of textural parameters of primary tumors, serum lactate dehydrogenase (LDH), D-dimer, and ferritin in high-risk neuroblastoma patients. PATIENTS AND METHODS The imaging findings of 22 neuroblastoma patients (14 girls and 8 boys; age, 36.6 ± 34.2 [range: 5 to 138] months) who underwent 18-fluorodeoxyglucose positron emission tomography/computed tomography for primary staging before therapy between 2009 and 2020 were retrospectively evaluated. Positron emission tomography-derived metabolic data (maximum standard uptake value, mean standard uptake value, metabolic tumor volume, and total lesion glycolysis) and textural features of primary tumors were obtained. Serum LDH, D-dimer, and ferritin levels at the time of diagnosis were recorded. Univariate and multivariate Cox proportional hazards regression models were used to identify predictors for progression-free survival (PFS) and overall survival (OS). Survival curves were estimated by using the Kaplan-Meier method. RESULTS The median follow-up duration after diagnosis was 63 months (range: 5 to 141 mo). The median PFS and OS in all patients were 19 and 72 months, respectively. In multivariate Cox regression analyses with backward stepwise selection, grey level size zone matrix_size zone emphasis (GLSZM_SZE) was found as an independent predictor for both PFS and OS. Serum ferritin level was also found as an independent predictor for PFS. The Kaplan-Meier survival analysis showed that higher serum LDH, D-dimer, GLSZM_SZE, and zone size nonuniformity were significantly associated with shorter OS. CONCLUSION Serum LDH, D-dimer, ferritin levels, and GLSZM_SZE of primary tumors may be used as prognostic biomarkers to identify patients with worse prognoses in high-risk neuroblastoma. GLSZM textural features showing higher tumor heterogeneity are significantly associated with shorter PFS and OS.