Hi @genola and welcome to Connect. A recent early-phase study has shown promise using CAR-T cell therapy in the treatment of metastatic colon cancer. You can read more about the promising results here:

CAR T-cell Therapy Seen to Treat Metastatic Colorectal Cancer in Mouse Study https://immuno-oncologynews.com/2018/05/16/humanized-car-t-immunotherapy-treats-metastatic-colorectal-cancer-in-mice-study/

It is important to note that this is a very early stage study done on mice. It has not yet been tested on humans. At this time CAR-T cell therapy is not yet used for colon cancer. There are other immunotherapies that have proven effective in the treatment of colon cancer, such as Pembrolizumab (Keytruda) and nivolumab (Opdivo) Ipilimumab (Yervoy).

Genola, I invite you to +Follow the Colorectal Cancer group here: https://connect.mayoclinic.org/group/colorectal-cancer/ where you'll meet others with colon cancer and talking about treatment options. Here are a few discussions you may wish to join:
- Immunotherapy - Keytruda for colorectal cancer https://connect.mayoclinic.org/discussion/immunotherapy-keytryda/
- Reoccurrence of colon cancer https://connect.mayoclinic.org/discussion/reoccurrence-of-colon-cancer/
- Have you had TACE or SirSpheres radiation treatment? Please share https://connect.mayoclinic.org/discussion/does-anyone-have-experience-with-receiving-tace-or-sirspheres-which-are-2/