Can radiotherapy be used for metastic colon cancer if chemotherapy is resistant ?

Selected instances: Metastatic colon cancer when in multiple areas and non resectable reequires chemotherapy. Radiation can not be used systemically and is delivered to a single site. If mass is large, in preparation for resection, radiation has been employed. New monoclonals being developed thatt have alpha emmitters and can be delivered to colon Ca as a form of internal radiation.

Not often: Radiotherapy can be useful in certain select cases where the Cancer is localized to one or two spots only. This means 1 patient in 5 may be suitable candidate. But you need to seek consultation with a radiation oncologist before you can get a clear cut answer for your circumstances.