Given the task definition and input, reply with output. In this task, you are given a sentence in the English language. Your job is to translate the English sentence into the Spanish language.

What is the diagnostic technique of choice to locate the origin of the primary tumor and its extension in patients with carcinoid syndrome?

¿Cuál es la técnica diagnóstica de elección para localizar el origen del tumor primario y la extensión del mismo en pacientes afectos de síndrome carcinoide?