SNAI1 and neoplasm: With increasing of the size of primary tumor, the number of CTCs in the following three populations increased: CD45–EpCAM+CK7–Snail–N-cadherin–Vimentin–, CD45–EpCAM+CK7–Snail–N-cadherin–Vimentin+, and CD45–EpCAM–CK7+Snail–N-cadherin–Vimentin– (Table 2).