1) Harm 2) Hurt 3) Injury 4) Trauma 
Intravasation is the invasion of cancer cells through the basal membrane into a blood or lymphatic vessel. Intravasation is one of several carcinogenic events that initiate the escape of cancerous cells from their primary sites. Other mechanisms include invasion through basement membranes, extravasation, and colonization of distant metastatic site...
The movement of a cell or a foreign substance through the wall of a blood or lymph vessel into the vessel itself. In cancer, this is how cancer cells pass through a vessel wall and enter the blood or lymph systems. It is one way that cancer spreads in the body.
(in-trav″ә-sa´shәn) the entrance of foreign material into vessels.
[n] - entry of foreign matter into a blood vessel
the entrance of foreign matter into a blood vessel of the body.