From: The therapeutic effect of radiotherapy combined with systemic therapy compared to radiotherapy alone in patients with simple brain metastasis after first-line treatment of limited-stage small cell lung cancer: a retrospective study
Monotherapy
(n = 50)
Combined therapy
P value
Radiotherapy
0.643
 SRS
5(10)
8(16)
 WBRT
20(40)
 WBRT + SRS
25(50)
22(44)
Systemic therapy
 CT
40(80)
 CT + ICIs
10(20)