CEACAM5 and leukoencephalopathy with calcifications and cysts: As shown in Figures 3, 4, no matter in training or validation sets, risk stratification can divide patients with different OS into the subgroups of LCC, RCC, CEA-elevated, and CEA-normal, which indicated that the nomogram was effective for the distinction of the prognosis in different CCLM patients subgroups.