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Vol. 44. Issue 2.
Pages 65-69 (January 2008)
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Vol. 44. Issue 2.
Pages 65-69 (January 2008)
Original Articles
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Results of Surgery for Non-Small Cell Cancer With N2 Involvement Unsuspected Before Thoracotomy
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Marcelo F. Jiménez
Corresponding author
mfjl@usal.es

Correspondence: Dr MF Jiménez Servicio de Cirugía Torácica, Hospital Universitario de Salamanca P.° de San Vicente 58 37007 Salamanca, Spain
, Gonzalo Varela, Nuria M. Novoa, José Luis Aranda
Servicio de Cirugía Torácica. Hospital Universitario de Salamanca. Salamanca. Spain
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Objective

To analyze survival in a group of patients with N2 involvement discovered during or after lung resection for non-small cell lung cancer and to evaluate the variables that affect survival.

Patients and methods

The study included all patients with non-small cell lung cancer who underwent resection between January 1994 and October 2004 and in whom the definitive tumor classification was stage pIIIA due to N2 extension (n=74) detected during surgery. Patients with stage pIIIB who had undergone induction chemotherapy and patients for whom surgery was considered incomplete were excluded.

Results

Mean survival times were significantly different (P=.002) between resection types: pneumonectomy, 18.1 months (95% confidence interval [CI], 6.9–29.2 months), and lobectomy, 42.4 months (95% CI, 28.7–56.1 months). The number of lymph-node stations affected did not have a significant effect on survival. However, when only 1 station was involved, mean survival was different for lobectomy and pneumonectomy (48.0 months [95% CI, 31–65 months] vs 14.8 months [95% CI, 4.8–24.7 months], respectively; P=.002) but no differences were found when N2 spread involved more than a single station. Adjuvant therapy was used in 50% of cases (n=35): chemotherapy in 6 cases; radiotherapy in 17 cases; and both in 12 cases. The mean survival rate for lobectomy patients with no adjuvant therapy was 31.6 months (95% CI, 15.6–47.5 months) and46.2 months (95% CI, 32.2–60.1 months) (P=.01) with adjuvant therapy, whereas there were no differences in the group of pneumonectomy patients.

Conclusions

Patients who undergo lobectomy clearly survive longer than those who undergo pneumonectomy when N2 lymph node involvement is found in only 1 station during surgery. Furthermore, adjuvant therapy may increase mean survival times for lobectomy patients.

Key words:
Non-small cell cancer
Lung resection
Mediastinal metastases
Prognosis
Objetivo

Analizar la supervivencia de un grupo de pacientes con afectación N2 descubierta durante o tras la realización de la cirugía de resección pulmonar reglada por carcinoma de pulmón no microcítico, y valorar las variables que influyen en dicha supervivencia.

Pacientes y métodos

Se incluyó en el estudio a todos los pacientes sometidos a resección pulmonar reglada con diagnóstico de carcinoma de pulmón no microcítico entre enero de 1994 y octubre de 2004, con extensión anatómica definitiva del tumor en el estadio qpIIIA por N2 (n = 74). Se excluyó a aquellos en estadio qpIIIB, con quimioterapia de inducción y aquellos en los que la cirugía se consideró incompleta.

Resultados

La media de supervivencia según el tipo de resección mostró diferencias significativas (p = 0,002) entre la neumonectomía (18,1 meses; intervalo de confianza [IC] del 95%, 6,9–29,2) y la lobectomía (42,4 meses; IC del 95%, 28,7–56,1). El número de estaciones ganglionares no mostró una influencia significativa en la supervivencia. Sin embargo, cuando hubo afectación de una sola estación, las medias de supervivencia fueron diferentes entre la lobectomía (48,0 me-ses; IC del 95%, 31–65) y la neumonectomía (14,8 meses; IC del 95%, 4,8–24,7; p = 0,002), y no fueron distintas cuando había más de una estación N2. En el 50% de los casos (n = 35) se realizó tratamiento adyuvante (quimioterapia sólo en 6 casos; radioterapia en 17, y ambas en 12). En el grupo de pacientes de lobectomía, la media de supervivencia sin adyuvancia fue de 31,6 meses (IC del 95%, 15,6–47,5) y con adyuvancia de 46,2 meses (IC del 95%, 32,2–60,1) (p = 0,01), mientras que no hubo diferencias en el grupo de neumonectomía.

Conclusiones

Cuando existe afectación N2 de una sola estación descubierta durante la cirugía, la lobectomía ofrece una supervivencia claramente superior a la neumonectomía; además, en este grupo de pacientes el tratamiento adyuvante puede aportar mayor supervivencia.

Palabras clave:
Carcinoma no microcítico
Resección pulmonar
Metástasis mediastínicas
Pronóstico
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