2012, Número 1
Tumores estromales gastrointestinales: diagnóstico y tratamiento
Acín-Gándara D, Pereira-Pérez F, Ángel Castaño-Pascual Á, Durán-Poveda M, Antequera-Pérez A, Miliani-Molina C
Idioma: Español
Referencias bibliográficas: 39
Paginas: 44-51
Archivo PDF: 394.13 Kb.
RESUMEN
Introducción: los tumores de la estroma gastrointestinal (GIST) son las neoplasias mesenquimales del tracto digestivo más frecuentes. Originados de las células intersticiales de Cajal se caracterizan por la sobreexpresión de la proteína KIT (tirosincinasa). El pronóstico de los GIST avanzados ha mejorado con el descubrimiento del mesilato de imatinib.
Material y métodos: estudio retrospectivo, descriptivo de los GIST diagnosticados en nuestro centro en los últimos 5 años. Se excluyeron aquellos pacientes diagnosticados incidentalmente en el contexto de otra enfermedad. Las variables estudiadas fueron: clínica, localización, tamaño, pruebas de imagen, resecabilidad, neoadyuvancia con imatinib, técnica quirúrgica, histología, inmunohistoquímica, clasificación pronóstica de Fletcher, morbilidad y mortalidad, seguimiento, supervivencia general y libre de enfermedad.
Resultados: se diagnosticaron 19 pacientes (14 varones y 5 mujeres) con edad media de 63 años (rango: 30-84). El diagnóstico fue incidental en 8 pacientes (42%). La localización tumoral de los 11 restantes (58%) fue: 6 intestino delgado (55%), 4 gástricos (36%) y 1 rectal (9%). Predominó la anemia y fueron diagnosticados mayoritariamente por tomografía computada (TC) abdominal. Al diagnóstico 9 pacientes se consideraron resecables (82%) y otros 2 (18%) recibieron tratamiento neoadyuvante. Se trataron 3 pacientes con imatinib posoperatorio (33%). La mediana de supervivencia fue 34 meses (rango: 5-58).
Conclusiones: el diagnóstico de GIST con frecuencia es incidental. La clínica predominante suele ser la anemia y la prueba de imagen la TC. El tratamiento de elección es quirúrgico, salvo el GIST avanzado que habitualmente recibe tratamiento neoadyuvante con mesilato de imatinib. Es fundamental realizar un abordaje multidisciplinario, lo que condiciona el pronóstico y la supervivencia de estos pacientes.
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