Abstract
From 1976 until 1990 a total of 212 patients with squamous cell carcinoma of the thoracic esophagus were referred for surgical treatment. Resectability was 84.1% (161 of 191). Actuarial 5-year survival in patients with negative lymph nodes was 51.2% versus 12.4% in lymph nodepositive patients. Therefore advanced carcinoma was defined to compromise all patients with involved regional (N1) or distal lymph nodes (M+Ly) as well as patients with T4 tumors or solid organ metastasis (M+org) irrespective of their lymph node status. Comparing complete (R0) versus incomplete (R1–R2) resections for stage III and IV carcinoma revealed 20% and 0% five-year survivals, respectively. There was no 5-year survival in the stage IV group. When excluding solid organ metastasis, the median survival shifted from 8.5 months after incomplete (R1–R2) to 20 months after complete (R0) resection. In 1991 three-field lymphadenectomy was initiated that included bilateral cervical lymphadenectomy. Thirty-seven patients have been treated so far (23 squamous cell carcinoma, 14 adenocarcinomas). Cervical lymph nodes were positive in 24.3% with an incidence up to 28.5% for distal-third carcinoma. Subsequently, 6 patients (16%) moved from M0 to M+Ly status. Our results confirm the key role of surgery not only in improving survival and locoregional tumor control but in refining the accuracy of staging advanced carcinomas provided complete resection is possible. Nowadays other options in the treatment of advanced carcinoma are mainly based on neoadjuvant chemoradiotherapy with response rates ranging from 40% to 60% but until now without evidence of improved 5-year survival rates and with local or distant failure rates of approximately 30% and 45%, respectively. For clinically nonresectable (T4) or presumed nonresectable tumors, neoadjuvant therapy seems to have an important role, as it may convert these tumors into resectable and therefore potentially curable cancers. Toxicity remains a drawback, as it is probably responsible for preoperative dropouts and slight but definitive higher postoperative mortality and morbidity. When the disease clearly is incurable, the best options today are laser therapy and an endoprosthesis, which result in good relief of dysphagia in approximately 80% to 85% of patients and a procedure-related mortality below 5%.
Résumé
Entre 1976 et 1990, 212 patients ayant un cancer épidermoïde de l'oesophage thoracique ont été traités dans notre unité. La résecabilité a été de 84.1% (161/191). La survie actuarielle à 5 ans a été de 51.2% lorsqu'il n'y avait pas d'atteinte ganglionnaire lymphatique comparée à 12.4% lorsque ces ganglionnaires étaient indemnes. Nous avons défini le cancer avancé comme les cnacers associés à une atteinte ganglionnaire régionale (N1) et/ou distale (M+Ly), ainsí que les tumeurs T4 ou associées à une métastase d'un organe solide (M+org), quel que soit l'état des ganglions. La survie a été de 20% et de 0%, respectivement, lorsqu'on a comparé la résection complète (R0) à la résection incomplète (R1–R2) chez les patients ayant un cancer stades III et IV. Il n'y a pas eu de survivant à 5 ans chez les patients stade IV. Lorsqu'on exclut les patients ayant une métastase siegeant au niveau d'un organe plein, la survie médiane passe de 8.5 mois pour les patients ayant eu une résection incomplète (R1–R2) à 20 mois après une résection complète (R0).
Depuis 1991, nous pratiquons une lymphadénectomie à trois champs en plus d'un curage cervical. Trente-sept patients ont été traités ainsi (23 cancers épidermoïdes, 14 adénocarcinomes). La lymphadénectomie cervicale a été positive chez 24.3% des cas en moyenne, 28.5% des cas lorsque le cancer intéressait le tiers supérieur de l'oesophage. Par la suite, six patients, (16%) ont du changer de catégorie, passant de M0 à M+Ly.
Nos résultats confirment le rôle essentiel de la chirurgie, qui, non seulement, améliore la survie et le contrôle locorégional mais aussi permet une classification anatomique précise des lesions dans le cancer avancé, à condition bien entendu que la résection complète soit possible.
Actuellement, les autres moyens thérapeutiques à notre disposition sont la chimio (radio-) thérapie dont les réponses varient entre 40 à 60%, mais, jusqu'à présent, sans preuve que celà améliore la survie à 5 ans. Les récidives locales et régionales sont d'environ 30 et 45%, respectivement. Dans les cas de tumeurs cliniquement non résecables (T4) ou présumées telles, la thérapie néoadjuvante semble importante et capable de rendre un certain nombre de ces tumeurs résecables, c'est-à-dire, potentiellement curables par résection. La toxicité est par contre un inconvénient majeur, responsable de l'abandon préopératoire de traitement et d'une certaine augmentation de la morbidité et de la mortalité postopératoires.
Lorsque la maladie est manifestement incurable, la meilleur option apparaît le forage par laser ou la mise en place d'une endoprothèse ce qui améliore la dysphagie chez 80–85% des cas avec une mortalité inférieure à 5%.
Resumen
Entre 1976 y 1990, doscientos doce pacientes con carcinoma escamocelular del esófago torácico fueron referidos a nuestro servicio para tratamiento quirúrgico. La tasa de resectabilidad fue 84.1% (161/19); la de sobrevida actuarial en los pacientes con ganglios linfáticos negativos fue de 51.2% vs. 12.4% en los casos con ganglios positivos. Por consiguiente, se consideró como casos de carcinoma avanzado a aquellos pacientes con ganglios afectados regionales (N1) y los distales (M+Ly), así como a los pacientes con tumores T4 o con metástasis a órganos sólidos (M+org), independiente de su status ganglionar. La comparación entre los pacientes en que se hizo resección completa (R0) vs. incompleta (R1–R2) para carcinomas en estados III y IV reveló una sobrevida a cinco años de 20% y de 0, respectivamente. No hubo sobrevida a 5 años entre los pacientes con estado IV. Al excluir los casos con metástasis a órganos sólidos la sobrevida media varió desde 8.5 meses en los casos de resección incompleta (R1–R2) a 20 meses en los de resección completa (R0).
A partir de 1991 se inició la linfadenectomía de tres campos, la cual incluye linfadenectomía cervical bilateral; 37 pacientes han sido tratados, 23 con carcinoma escamocelular y 14 con adenocarcinoma. Los ganglios cervicales fueron positivos en 24.3%, con una incidencia de carcinoma del tercio distal hasta de 28.5%. Luego de la operación, seis pacientes (16%) fueron reclasificados del estadío M0 al M0+Ly.
Nuestros resultados confirman el papel clave de la cirugía no solo en cuanto en mejorar los resultados de sobrevida y el control local-regional sino también a redefinir la certeza de la estadificación de los carcinomas avanzados, siempre y cuando sea posible realizar la resección completa.
Actualmente las otras opciones en el manejo del carcinoma avanzado se fundamentan principalmente en la quimio (radio) terapia neoadyuvante con tasas de respuesta que oscilan entre 40% y 60% pero, hasta ahora, sin evidencia de mejoría de la sobrevida a cinco años y con fallas locales y a distancia de aproximadamente 30% a 45%. Sin embargo, en los pacientes con tumores clínicamente no resecables (T4), o presumiblemente no resecables, la terapia neoadyuvante parece adquirir un papel más importante al lograr convertir estos tumores a casos resecables y, por consiguiente, potencialmente curables. La toxicidad sigue siendo un factor limitante y posiblemente responsable del número de casos que no completan el régimen preoperatorio así como de las ligeras, pero definitivamente más altas tasas, de morbilidad y mortalidad postoperatorias.
Cuando la enfermedad aparece claramente incurable, las mejores opciones en la actualidad son la resección endoscópica con láser o la endoprótesis, que resultan en buena paliación de la disfagia en aproximadamente 80–85% de los pacientes con una mortalidad relativa al procedimiento de menos de 5%.
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Lerut, T.E., de Leyn, P., Coosemans, W. et al. Advanced esophageal carcinoma. World J. Surg. 18, 379–387 (1994). https://doi.org/10.1007/BF00316818
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DOI: https://doi.org/10.1007/BF00316818