Baseline characteristics
METASTASES
The clinical characteristics of all the patients are shown in Baseline characteristics of all 1,284 patients from SEER.
Based on the presence or absence of extrapulmonary metastases to the bone, brain, and liver, we divided all patients into two cohorts, CCLM without extrapulmonary metastases (n = 418) and CCLM with extrapulmonary metastases (n = 866). We compared the differences in clinicopathological characteristics and treatment options between the two cohorts, as shown in 