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Medicina Clínica (English Edition) Effectiveness of thymectomy in myasthenia gravis: A study of 21 patients
Journal Information
Vol. 165. Issue 2.
(July 2025)
Brief report
Effectiveness of thymectomy in myasthenia gravis: A study of 21 patients
Efectividad de la timectomía en la evolución de la miastenia gravis: análisis de 21 pacientes
Sofía Corbaza,
Corresponding author
sofiacorbaz@gmail.com

Corresponding author.
, Andrea Savranskya, Nadia Gaetoa, Adolfo Galloa, Marcelo Barrenecheab, María Soledad Mongesa
a Servicio de Neurología, Hospital de Pediatría Prof. Dr. Juan P. Garrahan, Buenos Aires, Argentina
b Servicio de Cirugía General, Hospital de Pediatría Prof. Dr. Juan P. Garrahan, Buenos Aires, Argentina
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Abstract
Introduction

Myasthenia gravis is part of a group of neuromuscular junction disorders. Thymectomy has been shown to be effective for its clinical control. The aim of this study was to assess the usefulness and safety of thymectomy in children with myasthenia gravis.

Methods

An analytical, retrospective, longitudinal study was conducted by reviewing the medical records of 21 patients with myasthenia gravis who underwent thymectomy and were followed-up for one year post-surgery. The variables assessed included the activities of daily living score, pyridostigmine dose, corticosteroid dose, and myasthenia gravis exacerbations immediately before and up to one year after the surgery.

Results

The activities of daily living score significantly improved at 12 months (P=.002). Crises decreased within three months post-surgery; this trend was maintained at 12 months (P=.0003). However, the reductions in pyridostigmine (P=.147) and corticosteroid therapy (P=.11) at 12 months did not reach statistical significance.

Conclusions

Thymectomy showed benefits, including improved scores on the activities of daily living scale and a reduction in the frequency of myasthenia gravis exacerbations/crises. These findings suggest that thymectomy is a safe and valid option to consider for pediatric patients who have not responded to the first-line treatment.

Keywords:
Myasthenia gravis
Thymectomy
Treatment
Pediatrics
Resumen
Introducción

La miastenia gravis forma parte de un grupo de enfermedades de la placa neuromuscular de origen inmunomediado. La timectomía es eficaz para su control clínico. El objetivo de este trabajo es analizar la utilidad y seguridad de la timectomía en pacientes con miastenia gravis juvenil.

Métodos

Estudio retrospectivo analítico longitudinal de 21 pacientes con miastenia gravis juvenil sometidos a timectomía. Se compararon las variables escala de actividad de la vida diaria, dosis de piridostigmina, dosis de corticoterapia, reagudizaciones miasténicas antes y un año posterior a la cirugía.

Resultados

La Escala de actividades de la vida diaria mejoró a los 12 meses (P=,002). Las reagudizaciones y crisis miasténicas disminuyeron a los 12 meses (P=,0003). El descenso de piridostigmina (P=,147) y la corticoterapia (P=,11) a los 12 meses no fue significativo.

Conclusiones

En nuestros pacientes la timectomía mostró beneficios en la mejoría de puntaje en la escala de actividad de la vida diaria y reducción de reagudizaciones/crisis miasténicas. Es una opción segura y válida para pacientes que no responden a primera línea de tratamiento.

Palabras clave:
Miastenia gravis
Timectomía
Tratamiento
Pediatría

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