Researchers show a little radiation goes a long way in heating up cold tumors

A new conducted in both mice and a small group of patients with advanced cancers has shown that so-called 'cold' tumors that are nearly devoid of immune cells -- and therefore unresponsive to immunotherapy -- can be turned 'hot' with extremely low doses of radiation and the rational use of existing therapies.

source https://www.sciencedaily.com/releases/2021/09/210910121705.htm