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Acta Otorrinolaringológica Española Analysis of Microsatellite Instability in Laryngeal Squamous Cell Carcinoma
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Vol. 63. Issue 2.
Pages 79-164 (March - April 2012)
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Vol. 63. Issue 2.
Pages 79-164 (March - April 2012)
Original Article

Analysis of Microsatellite Instability in Laryngeal Squamous Cell Carcinoma

Análisis de la inestabilidad de microsatélites en el carcinoma escamoso de laringe
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Jorge García Martínez
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xurde_garcia@hotmail.com

Corresponding author.
, Jhudit Pérez-Escuredo, Dario García-Carracedo, Marta Alonso-Guervós, Carlos Suárez-Nieto, José Luis Llorente-Pendás, César Álvarez-Marcos, Mario Hermsen
Departamento de Otorrinolaringología, IUOPA, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
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Abstract
Introduction and objectives

The literature on the involvement of microsatellite instability in head and neck squamous cell carcinoma shows great variability, probably due to differences in the testing methods. Using a consensus detection system, we aimed to reach a reliable estimate of microsatellite instability prevalence in a subset of head and neck squamous cell carcinoma cases.

Methods

The microsatellite instability status of 43 patients with previously untreated primary laryngeal squamous cell carcinomas was analysed by a multiplex polymerase chain reaction assay including 5 mononucleotide repeat markers.

Results

Thirty-six cases showed a stable phenotype or a microsatellite stable phenotype (83.7%) and 7 cases (16.3%) showed a microsatellite instability-positive phenotype. One case showed instability in 3 of 5 markers, 1 case in 2 markers and 5 cases in 1 marker. The microsatellite instability-positive and stable cases did not differ with respect to age, tumour stage, lymph node or distant metastases.

Conclusions

Our data showed that a proportion of laryngeal squamous cell carcinomas are microsatellite instability positive. Knowledge of microsatellite instability patient status will allow adjusting anticancer therapy at an individual level.

Keywords:
Laryngeal squamous cell carcinoma
Microsatellite instability
Chemotherapy
Resumen
Introducción y objetivos

La literatura sobre la participación de la inestabilidad de microsatélites en el carcinoma de células escamosas de cabeza y cuello muestra una gran variabilidad, probablemente debido a las diferencias en la metodología de las pruebas. Utilizando un sistema de detección consensuado, nos planteamos como objetivo llegar a una estimación fiable de la prevalencia de la inestabilidad de microsatélites en un subconjunto de carcinomas de células escamosas de cabeza y cuello.

Métodos

Se analizó el estado de inestabilidad de microsatélites en 43 pacientes no tratados previamente y diagnosticados de un carcinoma primario de células escamosas de laringe mediante una prueba de PCR múltiple, incluyendo 5 marcadores repetidos de mononucleótidos.

Resultados

En 36 casos se observó un fenotipo estable o microsatélites estables (83,7%), y en 7 casos (16,3%) se mostró un fenotipo positivo de inestabilidad de microsatélites. Uno de los casos mostró inestabilidad en 3 de los 5 marcadores, otro mostró inestabilidad en 2 marcadores y 5 casos en un marcador. Entre los casos de inestabilidad de microsatélites positiva y los casos estables no hubo diferencias con respecto a la edad, el estadio del tumor, la afectación de los ganglios linfáticos o las metástasis a distancia.

Conclusiones

Nuestros datos muestran que una parte de los carcinomas de células escamosas de laringe presentan inestabilidad de microsatélites. El conocimiento sobre el estado de inestabilidad de microsatélites de los pacientes permitirá el ajuste de la terapia anti-cancerígena a nivel individual.

Palabras clave:
Carcinoma de células escamosas de laringe
Inestabilidad de microsatélites
Quimioterapia

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