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Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Staging in nasopharynx cancers prognostic value of volumetric parameters in [18F...
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Vol. 44. Issue 6.
(November - December 2025)
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692
Vol. 44. Issue 6.
(November - December 2025)
Original Article

Staging in nasopharynx cancers prognostic value of volumetric parameters in [18F]FDG PET/CT imaging

Estadificación en Cánceres de Nasofaringe: Valor Pronóstico de los Parámetros Volumétricos en Imágenes de [18F]FDG PET/CT
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692
Ç. Erola,
Corresponding author
drcaglagulerol@gmail.com

Corresponding author.
, Ö. Şahinb, G. Kanyılmazc, S. Erold
a Department of Nuclear Medicine, Beyhekim Training and Research Hospital, Konya, Turkey
b Department of Nuclear Medicine, Meram Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey
c Department of Radiation Oncology, Meram Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey
d Department of Radiology, Selcuk University, Faculty of Medicine, Konya, Turkey
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Abstract
Objective

The aim of our study was to determine whether volumetric parameters measured from the primary lesion and metastatic lymph node (LN) using [18F]FDG PET/CT imaging affect prognosis and survival in nasopharyngeal cancer (NPC) patients.

Material and methods

Our study included 62 patients diagnosed with NPC who underwent [18F]FDG PET/CT imaging for pre-treatment staging. SUVmax, SUVmean, MTV and TLG values were measured from the primary tumor and LN. Lymph node/primary tumor SUV ratio (NTR) was calculated. The relationships between volumetric parameters and overall survival (OS), locoregional recurrence-free survival (LRRFS), distant metastasis-free survival (DMFS) and progression-free survival (PFS) were evaluated.

Results

LN SUVmax and LN SUVmean values were significantly higher in patients with distant metastases (p = 0.002 and p = 0.016, respectively). NTR values were significantly higher in patients with distant metastases (p = 0.047). The ideal LN SUVmax and SUVmean cut-off values for predicting distant metastasis in patients with LN metastasis were 16.45 and 6.5, respectively. There was a statistically significant difference between the DMFSs of the two groups when the NTR cut-off value was 0.8 (p = 0.047). Multivariate analysis showed that LN SUVmax, LN SUVmean and NTR were associated with DMFS (P = 0.003, 0.05 and 0.014, respectively), while primary tumor TLG and MTV values were associated with LRRFS (P = 0.035 and 0.03, respectively).

Conclusion

In conclusion, we believe that LN SUVmax, SUVmean and NTR may be prognostic indicators for distant metastasis, and MTV and TLG for locoregional recurrence.

Keywords:
Nasopharyngeal cancer
[18F]FDG PET/CT
Lymph node
Standardized uptake value
Resumen
Objetivo

El objetivo de nuestro estudio fue determinar si los parámetros volumétricos medidos a partir de la lesión primaria y el ganglio linfático metastásico (GL) utilizando imágenes de PET/CT con [18F]FDG afectan el pronóstico y la supervivencia en pacientes con cáncer nasofaríngeo (NPC).

Material y métodos

Nuestro estudio incluyó a 62 pacientes diagnosticados con NPC que se sometieron a imágenes de PET/CT con [18F]FDG para la estadificación previa al tratamiento. Los valores de SUVmax, SUVmean, MTV y TLG se midieron en el tumor primario y en los ganglios linfáticos. Se calculó la relación SUV entre los ganglios linfáticos y el tumor primario (NTR). Se evaluaron las relaciones entre los parámetros volumétricos y la supervivencia global (SG), la supervivencia libre de recurrencia locorregional (SLRLR), la supervivencia libre de metástasis a distancia (SLMD) y la supervivencia libre de progresión (SLP).

Resultados

Los valores de GL SUVmax y GL SUVmean fueron significativamente más altos en pacientes con metástasis a distancia (p = 0.002 y p = 0.016, respectivamente). Los valores de NTR fueron significativamente más altos en pacientes con metástasis a distancia (p = 0.047). Los valores de corte ideales de GL SUVmax y SUVmean para predecir metástasis a distancia en pacientes con metástasis de GL fueron 16.45 y 6.5, respectivamente. Hubo una diferencia estadísticamente significativa entre el SLMD de los dos grupos cuando el valor de corte de NTR fue 0.8 (p = 0.047). El análisis multivariante mostró que GL SUVmax, GL SUVmean y NTR estaban asociados con SLMD (P = 0.003, 0.05 y 0.014, respectivamente), mientras que los valores de TLG y MTV del tumor primario estaban asociados con SLRLR (P = 0.035 y 0.03, respectivamente).

Conclusiones

En conclusión, creemos que GL SUVmax, SUVmean y NTR pueden ser indicadores pronósticos para la metástasis a distancia, y MTV y TLG para la recurrencia locorregional.

Palabras clave:
Cáncer nasofaríngeo
[18F]FDG PET/CT
Ganglio linfático
Valor de captación estandarizado

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