Publication date: Available online 7 February 2018
Source:Cancer/Radiothérapie
Author(s): R. Kinj, K. Bénézery, C. Florescu, B. Gery, J.L. Habrand, J. Thariat
Les tumeurs malignes de la tête et du cou ont un profil de récidive avant tout locorégional, la plupart des décès résultent de cette progression. L'optimisation de la réirradiation en situation de récidive, est un objectif majeur pour ces patients. Une recherche extensive a été réalisée à l'aide du moteur de recherche PubMed pour retrouver les publications traitant de cette thématique. Les premiers essais de réirradiation de la sphère ORL remontent aux années 1980 et les premiers par radiothérapie conformationnelle avec modulation d'intensité (RCMI) à la fin des années 1990. Comparée à la radiothérapie conformationnelle tridimensionnelle, la modulation d'intensité améliore les résultats cliniques et réduit la toxicité. Dans les séries de RCMI, associées ou non à une chimiothérapie concomitante, le taux de contrôle locorégional obtenu à 2 ans était de l'ordre de 45 à 65 % et celui de survie globale de 15 à 60 % selon les facteurs pronostiques. La survenue de toxicité aiguë de grade 3 était de l'ordre de 10 à 30 % des cas et celle de toxicité tardive de grade 3 de l'ordre de 15 à 50 %. Dans une population sélectionnée à faible volume tumoral, une réirradiation stéréotaxique de dose minimale de 35Gy donnait des résultats du même ordre qu'après RCMI. La réirradiation de tumeurs ORL par protons est encore peu évaluée du fait d'une accessibilité réduite à la technique. Le taux de toxicité semble inférieur à celui habituellement constaté après traitement par photons. Cependant, nous ne disposons pas d'un suivi assez long. Cette technique reste réservée aux protocoles de recherche et représente une perspective d'avenir dans ces situations.Malignant tumors of the head and neck have a predominantly regional recurrence pattern, with most deaths resulting from this progression. Optimization of re-radiation in recurrence setting is a major objective for these patients. Extensive research has been carried out with the PubMed search engine to find publications dealing with this topic. The first attempts to reirradiate the ORL sphere date back to the 1980s and the first to be performed by intensity modulation conformational radiotherapy (IMRT) date back to the late 1990s. Compared to 3 dimensional conformal radiotherapy, IMRT improves clinical outcomes and reduces toxicity. In IMRT series, associated or not with concomitant chemotherapy, the locoregional control obtained at 2 years was of the order of 45 to 65% and the overall survival of 15 to 60%, depending on predictive factors. Grade 3 acute toxicity occurred on the order of 10 to 30% and late-grade 3 toxicity on the order of 15 to 50%. In a selected population with low volumes tumors, stereotactic re-irradiation at a minimum dose of 35Gy obtained outcome comparable to IMRT. Re-irradiation of head and neck tumors by proton therapy is rare. The toxicity rate appears to be lower than that usually seen after photon therapy. However, we do not have a long follow-up. This technique therefore remains reserved for search protocols and represents a future perspective in these situations.
from #ORL-AlexandrosSfakianakis via ola Kala on Inoreader http://ift.tt/2DgLATQ
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