From: A comparison of the local immune status between the primary and metastatic tumor in colorectal cancer: a retrospective study
Primary tumor
Metastatic tumor
CD4
 Median (range)
2.9 (0.4–15.6)
2.1 (0.4–17.0)
CD8
3.7 (0.4–20.6)
3.1 (0.2–16.0)
FOXP3
2.7 (0–12.8)
1.7 (0.2–10.0)