Mise au pointPlace de la curiethérapie dans les rhabdomyosarcomes pédiatriquesBrachytherapy role in pediatric rhabdomyosarcomas
Section snippets
Introduction/Indications
Les rhabdomyosarcomes représentent les sarcomes des tissus mous les plus fréquents chez l’enfant. Ces tumeurs se caractérisent par leur chimiosensibilité. La chimiothérapie est toujours le premier traitement. Un traitement local est nécessaire en cas de reliquat tumoral après la chimiothérapie. Les rhabdomyosarcomes gynécologiques et vésicoprostatiques posent des problèmes thérapeutiques spécifiques puisque l’objectif est de guérir ces enfants avec le traitement le plus conservateur possible.
Techniques
Les techniques de curiethérapie dépendent des localisations tumorales. La curiethérapie en gynécologie est le plus souvent intracavitaire et interstitielle dans les tumeurs vésicoprostatiques.
Résultats
Peu d’institutions ont rapporté leur expérience en curiethérapie pédiatrique. Dans ce domaine, l’expérience de l’institut Gustave-Roussy reste primordiale.
Conclusion
La curiethérapie présente des avantages indéniables dans la prise en charge thérapeutique des rhabdomyosarcomes de l’enfant. En plus de ses avantages balistiques, les sources radioactives se déplaçant avec la tumeur, il n’est pas nécessaire, comme en radiothérapie externe, d’ajouter des marges de sécurité (volume cible prévisionnel, PTV) autour du volume cible anatomoclinique (CTV). De ce fait, les volumes traités sont de petite taille. La précision dans la détermination du volume cible
Déclaration d’intérêts
Les auteurs déclarent ne pas avoir de conflits d’intérêts en relation avec cet article.
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Five-Year Follow-up After Multimodal Treatment Incorporating HDR Brachytherapy for Bladder Prostate Rhabdomyosarcoma in Children
2022, International Journal of Radiation Oncology Biology PhysicsCitation Excerpt :However, radiobiological data supporting a better therapeutic ratio for LDR, as well as randomized studies reporting a higher probability of late side effects with higher dose rates, were also recognized.28 Bladder-prostate RMS is relatively radiosensitive, and brachytherapy doses between 30 and 60 Gy have been reported.20,28 We used doses in the range of 39 to 42 Gy, with accelerated fractionation, to increase the biological effect in relation to the prescribed physical dose.
Use of an intravaginal spacer in young girls treated with brachytherapy for bladder neck rhabdomyosarcoma: Dosimetric impact for organs at risk sparing and acute tolerance
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Brachytherapy for sarcomas
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