intravasation and extravasation of tumor cells appeared to be similar cell biological phenomenon , in which two different ways were involved : 1 ) tumor cells migrated through the pores in the vascular walls which were produced by direct actions of tumor cells , and 2 ) endothelial cell cytoplasms enclosed the tumor cells neighboring to the vascular walls and as a result intravascular or extravascular tumor cell movement occurred .
C0007634
cell
C0010834
cytoplasms