Table 3:

Morphological and functional characteristics of the vasculature in normal tissue and in an untreated tumor (reproduced from 93).

Properties	Normal vessel	Tumoral vessel (untreated)
Global morphology	Normal	Abnormal, tortuous
Pericyte	Normal	Absent or detached
Vessel diameter	Normal	Dilated, variable
Vascular density	Normal, homogeneous distribution	Abormal, heterogeneous distribution
MVP and IFP	MFP>IFP	MVP ~ IFP
Plasma and interstitial oncotic pressure	P>I	P ~ I
pO2	Normal	Hypoxia

MVP, microvascular pressure; IFP, interstitial fluid pressure;

P, plasma oncotic pressure; I, interstitial oncotic pressure.