Tumor vasculature and embolized regional tissue

Tumor vasculature and embolized regional tissue refers to the anatomical and physiological site targeted during locoregional therapies for solid tumors, particularly in the liver. This target is not a single molecule but a complex environment consisting of the neovascular network that sustains tumor growth and the surrounding tissue that undergoes therapeutic ischemia [NIH: PMC4354411]. The primary biological function of this site is to provide the necessary blood flow and nutrients for malignant proliferation, which is exploited by procedures like Transarterial Chemoembolization (TACE) [StatPearls: NBK537188]. In these procedures, embolic agents and drugs such as Doxorubicin or Yttrium-90 are delivered directly into the tumor-feeding arteries to induce necrosis [PubMed: 30222038]. This approach is a cornerstone in managing unresectable hepatocellular carcinoma and certain metastatic diseases, aiming to maximize local therapeutic effect while minimizing systemic side effects [PubMed: 28633205]. Clinical monitoring often involves imaging-based biomarkers and serum markers like Alpha-fetoprotein to assess the efficacy of the embolization [PubMed: 25243114]. Safety concerns include post-embolization syndrome and the potential for off-target damage to healthy regional tissues.

Other names

Tumor neovasculatureEmbolized tumor bedTumor-associated endotheliumTumor blood vessels

Induction of tumor ischemia through physical occlusion of the arterial supply combined with localized delivery of cytotoxic or radioactive agents to the tumor bed.