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Gammagrafía con MIBG - Overview

Nombres alternativos

Imágenes de la médula suprarrenal; Gammagrafía con meta-yodobenzilguanidina

Definición:

Es un examen imagenológico en el que se utiliza una sustancia radiactiva (llamada marcador) y un escáner especial para encontrar o confirmar la presencia de feocromocitoma y neuroblastoma, los cuales son tumores de tipos específicos de tejido nervioso.

Ver también: gammagrafía nuclear

Forma en que se realiza el examen:

Se inyecta un radioisótopo (MIBG, yodo-131-metayodobenzilguanidina) en una vena. Este compuesto se fija a las células de un tumor específico.

Más tarde ese mismo día (o al día siguiente), usted se acuesta en una mesa que se ubica bajo el brazo del escáner y se hace un rastreo del abdomen. Es posible que se le solicite regresar para la toma de gammagrafías repetitivas en un período de 1 a 3 días, cada una de las cuales dura de 1 a 2 horas.

Antes o durante el examen, a usted se le puede suministrar una solución yodada para impedir que la tiroides absorba demasiado radioisótopo.

Preparación para el examen:

Usted debe firmar una autorización. Se le pedirá que se ponga una bata hospitalaria, aunque se puede permitir el uso de ropa holgada. Es necesario quitarse las joyas u objetos de metal antes de la realización de cada gammagrafía.

Lo que se siente durante el examen:

Se sentirá un punzada aguda cuando se inyecte el material. La mesa puede sentirse fría o dura. Usted debe permanecer inmóvil durante el procedimiento.

Razones por las que se realiza el examen:

Este examen se realiza para confirmar la presencia de feocromocitoma o neuroblastoma.

  • Reviewed last on: 11/21/2010
  • David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Referencias

Aslam S, Sohaib A, Rockall A, Bomanji JB, Evanson J, Roznek RH. Imaging of the endocrine system. In: Adam A, Dixon AK, eds. Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 71.

Segerman D, Miles KA. Radionuclide imaging: general principles. In: Adam A, Dixon AK, eds. Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 7.

Young WF. Adrenal medulla, catecholamines, and pheochromocytoma. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 246.

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