You need 2 or 3 courses of Chemo. Rx to shrink the tumor as much as possible. You then need consolidation Radiation Rx. to the residual tumor, since it is very hard to get tumoricidal doses of Chemo. Rx. into the middle of a large mass, because the circulation into the middle of the mass is so poor.
Radiation goes right thru everything to kill the tumor cells.
While every patient is unique and there exceptions to every rule, not doing combined chemotherapy and radiation for your SCLC is likely to result in a greatly shortened life.
the radiotherapy in combination with the
chemotherapy, the better is the result.