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Vol. 71. Issue 3.
Pages 133-136 (March 2002)
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Vol. 71. Issue 3.
Pages 133-136 (March 2002)
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El rendimiento diagnóstico del 99mTc-sestamibi cambia según la localización y el tipo de hiperparatiroidismo. Análisis multivariante
The diagnostic yield of 99mtc sestamibi changes according to localization and type of hyperparathyroidism. Multivariate analysis
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R. Gamóna,*, J. Escriga, J.L. Salvadora, E. Marcoteb, A. Larac, J. De Lerad
a Servicio de Cirugía General y Digestiva. Hospital General de Castellón
b Servicio de Cirugía General. Hospital Comarcal de Vinaroz
c Servicio de Medicina Nuclear. Hospital Provincial de Castellón
d Servicio de Medicina Interna. Hospital General de Castellón. España
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Objetivos

Analizar el rendimiento diagnóstico preoperatorio del 99mTc-sestamibi en el hiperparatiroidismo teniendo en cuenta diversos factores que pueden influir en el resultado, con la finalidad de determinar si es fiable la exploración quirúrgica selectiva en el tratamiento de esta enfermedad basada en los hallazgos obtenidos en la prueba

Material y método

Se estudian mediante regresión logística los resultados en 92 glándulas de 22 pacientes con hiperparatiroidismo primario y secundario. Se calcula la sensibilidad, la especificidad y los valores predictivos introduciendo como variables independientes el tipo de hiperparatiroidismo, la localización de las glándulas afectadas, los valores de calcemia y de paratohormona y la enfermedad tiroidea concomitante

Resultados

Hubo diferencias acusadas en magnitud y estadísticamente, según el tipo de hiperparatiroidismo y la localización superior, inferior o ectópica de las glándulas patológicas. Otras variables no demostraron ninguna influencia significativa. Para los adenomas, los índices diagnósticos fueron suficientemente elevados: sensibilidad del 71-94%, especificidad del 90-97%. Para las hiperplasias secundarias la sensibilidad fue muy baja (8-37%), pero con especificidades del 100%

Conclusiones

En el caso de adenomas paratiroideos, el sestamibi puede ofrecer suficiente seguridad diagnóstica como para poder justificar una exploración cervical selectiva sobre la base de los hallazgos que proporciona. En el hiperparatiroidismo secundario la prueba es poco fiable

Palabras clave:
Hiperparatiroidismo
99mTc-sestamibi
Rendimiento diagnóstico
Análisis multivariante
Introduction

The aim of this study was to analyze the preoperative diagnostic yield of 99mTC Sestamibi in hyperparathyroidism. The influence of several factors on the results was assessed to determine whether selective surgical exploration based on the findings of the test is reliable in the treatment of this disease

Material and methods

Logistic regression was used to study the results in 92 glands from 22 patients with primary or secondary hyperparathyroidism. Sensitivity, specificity and predictive values were calculated by introducing hyperparathyroidism, the localization of affected glands, calcemia and parathormone levels, and concomitant thyroid disease as independent variables

Results

Marked and statistically significant differences were found according to the type of hyperparathyroidism and whether the localization of affected glands was superior, inferior or ectopic. Other variables showed no significant influence. For adenomas, the diagnostic indices were sufficiently high: sensitivity was 71-94% and specificity was 90-97%. For secondary hyperplasias sensitivity was very low (8-37%) but specificity was 100%

Conclusions

In the case of parathyroid adenomas, 99mTc Sestamibi offers sufficient diagnostic accuracy to justify selective cervical exploration based on its results. In secondary hyperparathyroidism, the test is insufficiently reliable

Key words:
Hyperparathyroidism
99mTc Sestamibi
Diagnostic yield
Multivariate analysis
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Copyright © 2002. Asociación Española de Cirujanos
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