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Adjuvant therapy for adenocarcinoma of the rectum

  • World Progress In Surgery
  • Published:
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Abstract

Surgical resection continues to be the primary curative modality for patients with adenocarcinoma of the rectum. However, local tumor recurrence in the pelvis and/or distant metastasis may occur in spite of complete excision of grossly visible malignant disease. Surgical and pathologic staging can identify a subset of surgically treated rectal cancer patients at high risk for tumor relapse and death. Irradiation and chemotherapy have been used as adjuvant therapy in conjunction with surgery as single modalities and in combination for patients with high risk rectal cancer. Evidence from controlled clinical trials indicates a significant decrease in local tumor recurrence, and a significant improvement in disease-free and overall survival with the use of combined postoperative irradiation and chemotherapy in this setting. A current national clinical trial in the United States of America is studying whether irradiation can be combined with new chemotherapy regimens which have shown significant therapeutic benefit as surgical adjuvant therapy for patients with high risk colon cancer (5FU + levamisole) and for patients with metastatic colorectal cancer (5FU + leucovorin) to further improve the efficacy of surgical adjuvant therapy for adenocarcinoma of the rectum.

Résumé

La chirurgie est le principal moyen thérapeutique de l'adénocarcinome du rectum. La récidive tumorale pelvienne et/ou à distance peut cependant se produire malgré une résection apparemment complète. Un bilan d'extension chirurgical et anatomopathologique peut identifier un sous-groupe de patients susceptible de présenter une récidive ou d'en mourir. La radio-et chimiothérapie ont été préconisées comme traitement adjuvant après l'exérèse chirurgicale, soit seule, soit combinée, chez cez patients à risque. Les résultats de plusieurs essais thérapeutiques semblent indiquer que la radio-et la chimiothérapie combinée à la chirurgie diminuent significativement le taux de récidives locales et améliorent significativement la survie globale et la survie sans maladie. Un essai actuellement en cours aux Etats-Unis étudie si la radiothérapie peut être utilement combinée avec les nouveaux régimes chimiothérapeutiques ayant fait preuve de leur efficacité chez les patients à risque (5FU + lévamisole) ou chez les patients ayant des métastases (5FU + leucovin).

Resumen

La resección quirúrgica continúa siendo la modalidad curativa primaria en pacientes con adenocarcinoma del recto. Sin embargo, la recurrencia local del tumor en la pelvis y/o las metástasis distantes puede ocurrir a pesar de la resección completa de la enfermedad maligna macroscópicamente visible. La estadificación operatoria y patológica puede indentificar un subgrupo de pacientes tratados quirúrgicamente con alto riesgo de relapso tumoral y meserte. La irradiación y la quimioterapia han sido utlizados como terapia adyuvante en unión con la cirugía como modalidades únicas y en combinación para pacientes con cáncer rectal de alto riesgo. La evidencia surgida de ensayos clínicos controlados señala una disminución significativa en las tasas de recurrencia tumoral local, y una superación significativa en las tasas globales de sobrevida y de sobrevida libre de enfermedad con el uso de la combinación postoperatoria de irradiación y quimioterapia. Un ensayo clínico nacional que se ejecute en el momento actual en los Estados Unidos investiga si la irradiación puede ser combinada con los nuevos regímenes quimioterapéuticos que han demostrado beneficio significantivo como terapia quirúrgica adyuvante en pacientes con cáncer de colon de alto riesgo (5 FU + levamisol) y en pacientes con cáncer colorrectal metastásico (5 FU + leucovorin) con el propósito de mejorar aún más la eficicacia de la terapia quirúrgica adyuvante en el adenocarcinoma del recto.

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Authors and Affiliations

  1. Department of Oncology, Mayo Clinic and Mayo Medical School, U.S.A., Rochester, Minnesota

    Michael J. O'Connell M.D. & Leonard L. Gunderson M.D., M.S.

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  1. Michael J. O'Connell M.D.
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  2. Leonard L. Gunderson M.D., M.S.
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O'Connell, M.J., Gunderson, L.L. Adjuvant therapy for adenocarcinoma of the rectum. World J. Surg. 16, 510–515 (1992). https://doi.org/10.1007/BF02104456

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