Salute e malattia
* Il National Cancer Institute: [https://www.cancer.gov/types/colorectal/](https://www.cancer.gov/types/colorectal/)
* La Clinica Mayo: [https://www.mayoclinic.org/diseases-conditions/rectal-cancer/symptoms-causes/syc-20352256](https://www.mayoclinic.org/diseases-conditions/rectal-cancer/symptoms-causes/ syc-20352256)
* WebMD: [https://www.webmd.com/colorectal-cancer/rectal-cancer](https://www.webmd.com/colorectal-cancer/rectal-cancer)
* Linea sanitaria: [https://www.healthline.com/health/rectal-cancer](https://www.healthline.com/health/rectal-cancer)
altri tumori