Tumor tissue perfusion

Tumor tissue perfusion refers to the dynamic process of blood flow through the microvascular network of a tumor, providing essential nutrients and oxygen while removing metabolic waste products. Unlike healthy tissue, tumor perfusion is frequently characterized by chaotic, inefficient, and leaky vasculature, leading to high interstitial fluid pressure and regions of chronic hypoxia (Jain, Science, 2005). These physiological abnormalities serve as significant barriers to the effective delivery of systemic chemotherapy and contribute to an aggressive, pro-metastatic tumor phenotype. Although not a single molecular target, tumor perfusion is a major therapeutic focus; anti-angiogenic therapies aim to 'normalize' the vessel structure to improve blood flow and drug penetration, while vascular disrupting agents (VDAs) seek to rapidly collapse existing tumor vessels to cause extensive necrosis (Tozer et al., Nature Reviews Cancer, 2005). Monitoring changes in perfusion via advanced imaging modalities like DCE-MRI or PET is a critical clinical biomarker for evaluating the efficacy of vascular-targeted treatments.

Other names

Tumor blood flowMicrovascular perfusionIntratumoral blood flowRegional tumor blood flow

Modification of tumor vasculature via vascular normalization (anti-angiogenics) or acute vascular collapse (vascular disrupting agents).