Résumé
La prise en charge par exérèse locale d’un petit cancer du rectum permet d’éviter la morbidité et les séquelles d’une exérèse du rectum et du mésorectum. Cette stratégie s’adresse à des patients et des tumeurs sélectionnés sur des critères cliniques et écho-endoscopiques (usTis et usT1). Différentes techniques chirurgicales et endoscopiques permettent actuellement de réaliser ce geste d’excision locale avec un avantage à la microchirurgie transanale endoscopique (TEM). Le risque d’envahissement ganglionnaire peut être estimé après l’exérèse locale par la recherche sur pièce opératoire de facteurs de bon pronostic: adénocarcinome pTis ou pT1sm1, moyennement ou bien différencié, absence d’emboles vasculaires ou lymphatiques, et absence de budding tumoral. En présence de facteurs de mauvais pronostic, une résection rectale complémentaire avec exérèse mésorectale s’impose. Un traitement adjuvant de rattrapage par irradiation pelvienne n’est pas recommandé.
Abstract
Local excision for early rectal cancer allows rectal conservation without morbidity compared to total mesorectal excision. This strategy is indicated in patients with tumors selected on clinical and EUS criteria (usTis and usT1). Different surgical and endoscopic procedures are currently used to perform local excision with an advantage to TEM. The risk of lymph node involvement can be assessed after local excision by research on surgical specimen of good prognosis criteria such as: pTis or pT1sm1 adenocarcinoma, moderately or well-differentiated tumor, no vascular or lymphatic emboli, and no tumor budding. In the presence of poor prognosis criteria, additional rectal resection with TME is required. A salvage pelvic irradiation as adjuvant therapy is not recommended.
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Lakkis, Z., Barthet, M., Koch, S. et al. Recommandations pour la pratique clinique Cancer du rectum. Colon Rectum 10, 35–41 (2016). https://doi.org/10.1007/s11725-015-0618-y
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DOI: https://doi.org/10.1007/s11725-015-0618-y