Abstrait
Les tumeurs stromales gastro-intestinales sont des tumeurs rares, pouvant se localiser à tous les étages du tractus digestif, et représentant 10 à 50% des sarcomes des tissus mous. Elles représentent une entité nosologique particulière depuis la découverte de leur lien avec les cellules de Cajal, les cellules pacemakers de la motricité digestive. Sur le plan phénotypique, les cellules tumorales de GIST sont caractérisées par ľexpression du marqueur CD34, commun aux cellules de Cajal, et par ľexpression du récepteur tyrosine kinase c-kit (CD117) sous une forme mutée et/ou activée (1). Les GIST représentent désormais une entité nosologique particulière depuis la découverte en 1998 de ľexpression par les cellules tumorales du récepteur tyrosine kinase c-kit (CD117) sous une forme mutée et/ou activée à la surface des cellules tumorales (2). Ces mutations sont de survenue précoce et il est possible qu’elles constituent même ľévénement oncogénétique initial de la maladie. Avant ľimatinib, la chirurgie était le seul traitement efficace de cette pathologie, la chimiothérapie restant globalement inopérante, et la radiothérapie non applicable.
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Ray-Coquard, I., Bachelot, T., Guastalla, J.P., Blay, J.Y. (2008). Les autres inhibiteurs tyrosine kinase de KIT ou de la voie AKT. In: Les thérapies ciblées. Oncologie pratique. Springer, Paris. https://doi.org/10.1007/978-2-287-36008-4_8
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DOI: https://doi.org/10.1007/978-2-287-36008-4_8
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