Year 2013 / Volume 105 / Number 8
Letter to the Editor
Gastrointestinal stromal tumors (GIST): New treatment expectations

509-510

Ignacio Bodega Quiroga, Patricia Tejedor Togores, Miguel ángel Sáez García, Jesús Manuel Peraza Casajús, Natalia Rosado Dawid y ángel Serrano Muñoz

Abstract
Dear Editor,
Gastrointestinal stromal tumors (GIST) have been known for over twenty years, but until ten years ago they were a het- erogeneous group of neoplasms which included leiomyomas, leiomyosarcomas, leiomyoblastomas and schwannomas. They represent approximately 0.5-3 % of all primary tumors of the gastrointestinal tract, only 5 % of visceral sarcomas, but 80 % of malignant tumors originated in the mesenchymal tract (1). The belief that these tumors are the “benign” form of the gastrointestinal neoplasms is widespread. However, the most commonly used classification –Fletcher, 2002 (2), based on the tumor size and the mitotic count by 50 high power fields– divided GIST in very low, low, medium and high risk of malignancy.
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Ignacio Bodega Quiroga, Patricia Tejedor Togores, Miguel ángel Sáez García, Jesús Manuel Peraza Casajús, Natalia Rosado Dawid y ángel Serrano Muñoz. Gastrointestinal stromal tumors (GIST): New treatment expectations. 509-510


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