Embolization
![Micrograph of embolic material in the artery of a kidney. The kidney was surgically removed because of cancer. H&E stain.](/Images/godic/202501/15/Embolization_kidney0924.jpg")
![Post-embolization arteriogram showing coiled aneurysm (indicated by yellow arrows) of the posterior cerebral artery with a residual aneurysmal sac.](/Images/godic/202501/15/Coiled_PCA_residual_aneurysm_arteriogram0924.JPG")
Embolization refers to the passage of an embolus within the bloodstream. It may be pathological, for example as a surgical complication, or therapeutic, as a treatment for bleeding or some types of cancer by deliberately blocking blood vessels.