tumorangiografie

Tumorangiografie is an imaging modality aimed at visualizing the blood vessels that supply a tumor. By outlining the arterial feeders and the venous drainage, it helps describe the tumor’s vascularity, extent and relationship to surrounding structures. The technique is typically based on angiography with contrast and fluoroscopic imaging, and in many settings it uses digital subtraction angiography to enhance visualization of the tumor-feeding vessels.

Procedural approach can be invasive or noninvasive. Conventional catheter-based angiography involves selective catheterization of arteries that feed the tumor, followed by the injection of iodinated contrast and real-time imaging. This allows detailed maps of feeding arteries, collateral circulation and tumor blush. Noninvasive alternatives include CT angiography and MR angiography, and in many cases dynamic contrast-enhanced MRI or CT can provide similar information about perfusion and neovascularization without catheterization.

Applications of tumorangiography include preoperative planning and staging, guiding interventional procedures such as embolization or chemoembolization (for example in hepatic tumors), and evaluating tumor vascular response to anti-angiogenic therapies. It is particularly useful for identifying dominant feeding arteries, estimating tumor burden, and assessing changes in vascularity over time.

Risks and limitations accompany tumorangiography. The procedures are invasive and carry risks related to arterial puncture, contrast use (including allergic reactions and nephrotoxicity) and radiation exposure. Limitations include potential failure to visualize microvasculature, dependence on contrast uptake, and the need for specialized equipment and expertise.