Ekstravasation vil sige, at kræftmidlet, der normalt indsprøjtes i en vene, siver ud af venen eller ved et uheld indsprøjtes i det omgivende væv, hvor det kan medføre alvorlig skade.
Extravasation happens when an anti-cancer medicine that is normally injected into a vein leaks or is accidentally injected in the tissue surrounding the vein, where it can cause serious damage.