@tvichkon, I believe that @tymish17 and @vlpr have mentioned prophylactic brain radiation or prophylactic cranial irradiation (PCI).

I can imagine whether to have prophylactic brain radiation or not is a hard decision to make. Small cell lung cancer (SCLC) has a high risk for brain metastases, but what if you don't have metastasis? Age and other health factors also go into the decision making.

@tvichkon, what did you decide and what helped you make the decision?