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Yodo Dietético y Urinario en Relación con el Riesgo de Cáncer de Tiroides: Un Meta-Análisis
Cancer control : journal of the Moffitt Cancer Center
|January 20, 2026
Resumen
Los niveles elevados de yodo urinario se asocian con un mayor riesgo de carcinoma de tiroides (CT), incluido el carcinoma papilar de tiroides (CPT) y el microcarcinoma papilar de tiroides (CPTm). Sin embargo, la ingesta dietética de yodo no mostró una asociación significativa con el riesgo de CT en este meta-análisis.
Área de la Ciencia:
- Endocrinología
- Oncología
- Ciencia de la Nutrición
Sus antecedentes:
- La relación entre la ingesta de yodo y el riesgo de cáncer de tiroides, en particular el carcinoma papilar de tiroides (CPT), es compleja y debatida.
- Comprender esta asociación es crucial para la salud pública y el manejo clínico de las enfermedades tiroideas.
Objetivo del estudio:
- Realizar un meta-análisis para evaluar la asociación del riesgo entre los niveles de ingesta de yodo y la incidencia de carcinoma de tiroides (CT).
- Evaluar específicamente el riesgo de carcinoma papilar de tiroides (CPT) y microcarcinoma papilar de tiroides (CPTm) en relación con la exposición al yodo.
Principales métodos:
- Búsqueda sistemática en cuatro bases de datos principales (Cochrane Library, Embase, PubMed, Web of Science) de estudios relevantes.
- Inclusión de 17 estudios con un total de 273.651 participantes, evaluados en cuanto a calidad utilizando la Escala Newcastle-Ottawa.
- Análisis estadístico realizado utilizando Stata 17 para determinar las odds ratios y los intervalos de confianza.
Principales resultados:
- Las concentraciones elevadas de yodo urinario se asociaron significativamente con un mayor riesgo de CT (OR: 6,43, P < 0,05).
- Se observó un riesgo elevado para el carcinoma papilar de tiroides (CPT) (OR: 7,56, P < 0,001) y el microcarcinoma papilar de tiroides (CPTm) (OR: 8,96, P < 0,001).
- No se encontró una asociación significativa entre la ingesta dietética de yodo y el riesgo de CT (OR: 0,75, P > 0,05).
Conclusiones:
- La excreción elevada de yodo urinario está definitivamente relacionada con un mayor riesgo de carcinoma de tiroides.
- La asociación entre la ingesta dietética de yodo y el riesgo de CT requiere una mayor investigación.
- Se necesitan futuros estudios prospectivos a gran escala para validar estos hallazgos y aclarar el papel del yodo dietético.
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