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Vol. 70. Issue 3.
Pages 142-146 (September 2001)
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Vol. 70. Issue 3.
Pages 142-146 (September 2001)
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Valoración inmunohistoquímica de la expresión de c-erb B2 como variable independiente en el carcinoma mamario T2N1 patológico
Immunohistochemical evaluation of c-erb B2 expression as an independent variable in T2N1 breast carcinoma
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F. Vicente García1,*, B. Larrinaga**, M.C. Miranda Murua*, P. Soriano Gil Albarellos**, A. Calvo Benito*, J.M. Lera Tricas*
* Servicio de Cirugía General y digestiva
** Servicio de Anatomía Patológica. Hospital de Navarra. Pamplona
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Resumen
Introducción

La incidencia de carcinoma mamario oscila entre 11 y 80 casos por 100.000 mujeres/año. El desarrollo de técnicas de inmunohistoquímica, para la determinación de marcadores tumorales ha posibilitado la realización de trabajos retrospectivos que nos permitan valorar su utilidad como factores pronósticos. Diversos trabajos relacionan la sobreexpresión de c-erb B2 con factores pronósticos. El objeto de nuestro estudio es determinar si la sobreexpresión de c-erb B2 es un factor pronóstico independiente en el grupo de pacientes seleccionado.

Pacientes y métodos

Se trata de 83 pacientes intervenidas entre 1980 y 1990 por carcinoma ductal infiltrante de mama, T2N1 patológico.

Hemos utilizando el kit Super Sensitive Immunodetection System de Biogenex, para la determinación de c-erb B2.

El análisis estadístico de los datos obtenidos se ha realizado mediante las pruebas de ?2 para variables cualitativas y la t de Student y análisis de la variancia para variables cuantitativas.

Resultados

El 35% de las pacientes mostró sobreexpresión de c-erb B2. El 48% de las pacientes prasentó progresión de la enfermedad. No hemos encontrado diferencias significativas al comparar sobreexpresión de c-erb B2 con ningún parámetro estudiado salvo una relación inversa, estadísticamente significativa, entre c-erb B2 y receptores estrogénicos (p = 0,0403).

Conclusiones

El c-erb B2 determinado mediante inmunohistoquímica no es un factor independiente de pronóstico en carcinomas ductales infiltrantes de mama T2N1.

Los receptores estrogénicos presentan una relación inversa con c-erb B2 con significación estadística.

Palabras clave:
Cáncer de mama
c-erb B2
Pronóstico
Inmunohistoquímica
Introduction

The incidence of breast carcinoma oscillates between 11 and 80 cases per 100,000 women/ year. Due to the development of immunohistochemical techniques for the determination of tumoral markers, retrospective studies can be performed to evaluate their utility as prognostic factors. Several studies have associated c-erb-B2 overexpression with prognostic factors. The aim of this study was to determine whether c-erb B2 overexpression is an independent prognostic factor in the group of patients selected.

Patients and methods

We studied a series of 83 women who underwent surgery for infiltrating T2 N1 ductal carcinoma of the breast between 1980 and 1990. The Biogenex super sensitive immunodetection system was used to determine c-erb B2. In the statistical analysis the Chi-squared test and Student‘s ttest were used to evaluate qualitative variables and analysis of variance was used to evaluate quantitative variables.

Results

Thirty-five percent of the patients showed overexpression of c-erb B2. Forty-eight percent of the patients showed disease progression. No significant differences were found in the comparison between cerb B2 overexpression and the other variables studied except an inverse, statistically significant relationship between c-erbB2 and estrogen receptors (p = 0.0403). Conclusions. Immunohistochemically-determined cerb B2 is not an independent prognostic factor in T2 N1 infiltrating ductal carcinoma of the breast. Estrogen receptors present a statistically significant inverse relationship with c-erb B2.

Key words:
Breast cancer
C-erb B2
Prognosis
Immunohistochemistry
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Copyright © 2001. Asociación Española de Cirujanos
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