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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) SPECT-CT in the localization of an ectopic retropharyngeal parathyroid adenoma a...
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Vol. 31. Issue 5.
Pages 275-277 (September - October 2012)
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Vol. 31. Issue 5.
Pages 275-277 (September - October 2012)
Clinical note
SPECT-CT in the localization of an ectopic retropharyngeal parathyroid adenoma as a cause for persistent primary hyperparathyroidism
Valor del SPECT-TAC en la localización de un adenoma de paratiroides ectópico retrofaringeo como causa de hiperparatiroidismo primario persistente
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P. García-Talaveraa,
Corresponding author
palomagtalavera@gmail.com

Corresponding author.
, M.L. Gonzáleza, G. Aísb, R. Olmosa, M.Á. Ruiza, A. Sainza, C. Gamazoa, A. Gómeza
a Servicio de Medicina Nuclear, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
b Servicio de Cirugía General, Hospital General de Segovia, Segovia, Spain
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Abstract

A common cause for surgical failure of primary hyperparathyroidism (pHPT) is the non-detection of an ectopic adenoma during the intervention. We present a case of a patient with pHPT in whom an ectopic gland was found in the right retropharyngeal space by means of a double phase 99mTc-methoxy-isobutyl-isonitrile (99mTc-MIBI) scintigraphy and early SPECT-CT after several surgeries and imaging tests.

Adding a tomography to the planar scintigraphy increases its sensitivity and improves pathological parathyroid glands localization. The hybrid imaging is sometimes essential to obtain surgical success, as in the case of ectopic adenomas.

Keywords:
Ectopic adenoma
99mTc-MIBI parathyroid scintigraphy
SPECT-CT
Persistent hyperparathyroidism
Resumen

Una causa frecuente de fracaso de la cirugía del hiperparatiroidismo primario (HPTp) es la existencia de un adenoma ectópico no detectado en la intervención. Presentamos a una paciente con HPTp en la que, tras sucesivas intervenciones y pruebas de imagen, se encuentra una glándula ectópica en el espacio retrofaríngeo derecho mediante gammagrafía de doble fase con 99mTc-metoxi-isobutil-isonitrilo (99mTc-MIBI) y SPECT-TAC precoz.

La adición de una tomografía al estudio gammagráfico planar, aumenta su sensibilidad y mejora la localización de las paratiroides patológicas. En ciertas ocasiones, como es el caso de adenomas ectópicos, la imagen híbrida será esencial para conseguir el éxito quirúrgico.

Palabras clave:
Adenoma ectópico
Gammagrafía de paratiroides con 99mTc-MIBI
SPECT-TAC
Hiperparatiroidismo persistente

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