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Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Clinical contribution of 18F-FDG PET/CT in patients with pediatric bone tissue a...
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Original Article
Uncorrected Proof. Available online 4 December 2025
Clinical contribution of 18F-FDG PET/CT in patients with pediatric bone tissue and soft tissue sarcoma; a retrospective study
Contribución clínica de la PET/CT con 18F-FDG en pacientes pediátricos con sarcoma de tejido óseo y de tejidos blandos: un estudio retrospectivo
M.N. Engina,
Corresponding author
mugennkk@gmail.com

Corresponding author.
, G.G. Burala, E. Gülerb, A. Boza
a Akdeniz University Faculty of Medicine Department of Nuclear Medicine, Antalya, Turkey
b Akdeniz University Faculty of Medicine, Department of Pediatric Oncology, Antalya, Turkey
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Tables (5)
Table 1. Summary of variables.
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Table 2. Summary of variables with regard to diagnosis.
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Table 3. Survival times (months) with the Kaplan Meier method and comparisons of groups with the log rank test.
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Table 4. Significant factors independently associated with mortality, Cox regression analysis.
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Table 5. Progression-free survival times (months) with the Kaplan Meier method and comparisons of groups with the log rank test.
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Abstract
Objective

To assess whether parameters derived from ¹⁸F-FDG PET/CT imaging could be used for prognostic evaluation in pediatric patients with bone and soft tissue sarcomas.

Material and methods

This retrospective study included pediatric patients diagnosed with sarcoma who underwent ¹⁸F-FDG PET/CT between February 2013 and January 2021. A total of 63 patients were evaluated. Anatomical tumor volume, standardized uptake values (SUV), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) were measured. Progression-free survival (PFS) and overall survival (OS) were calculated. Cox regression analysis was performed to identify independent predictors.

Results

The mortality rate was 31.7%, and the median OS was 54.9 months. Lung (p < 0.001) and lymph node metastases (p = 0.049) were associated with shorter OS. Younger age at diagnosis (p = 0.014), higher anatomical tumor volume (p = 0.002), and lung metastasis (p = 0.004) were independently associated with increased mortality risk. High MTV was independently associated with higher progression risk (p < 0.001).

Conclusion

Anatomical tumor volume and lung metastasis predict mortality, while MTV predicts progression in pediatric sarcoma. Further prospective studies are needed to validate these findings.

Keywords:
Child
Sarcoma
Positron emission tomography
18F-FDG
Prognosis
Survival
Resumen
Objetivo

Evaluar si los parámetros obtenidos de las imágenes de PET/CT con ¹⁸F-FDG pueden emplearse como predictores pronósticos en pacientes pediátricos con sarcomas óseos y de tejidos blandos.

Material y métodos

Estudio retrospectivo realizado en pacientes pediátricos con sarcoma, sometidos a PET/CT con 18F-FDG entre febrero de 2013 y enero de 2021. Se incluyeron 63 pacientes. Se analizaron los volúmenes tumorales anatómicos, los valores SUV, MTV y TLG. Se calcularon la supervivencia libre de progresión (SLP) y la supervivencia global (SG). Se emplearon análisis de regresión de Cox para identificar predictores independientes de mortalidad y progresión.

Resultados

La tasa de mortalidad fue del 31,7% y la mediana de SG fue de 54,9 meses. Las metástasis pulmonares (p < 0,001) y en ganglios linfáticos (p = 0,049) se asociaron con menor SG. Una edad menor al diagnóstico (p = 0,014), un volumen tumoral elevado (p = 0,002) y metástasis pulmonares (p = 0,004) fueron factores independientes asociados con mayor riesgo de mortalidad. MTV alto se asoció con mayor riesgo de progresión (p < 0,001).

Conclusión

El volumen tumoral anatómico y las metástasis pulmonares se asocian con mortalidad, mientras que MTV predice progresión. Se necesitan estudios prospectivos para confirmar estos hallazgos.

Palabras clave:
Pediatría
Sarcoma
Tomografía por emisión de positrones
18F-FDG
Pronóstico
Supervivencia

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