A radioactive stent formed in a body lumen is provided. The radioactive stent includes an article shaped to provide support to a section of a body lumen and allow biological material which would otherwise flow through the body lumen to flow through the article, the article including a non-fluent stent composition containing a radioactive isotope with a short half-life in intimate contact with the section of the body lumen which was delivered through the body lumen to the section as a fluent pre-stent composition and transformed adjacent the section of the body lumen to the non-fluent stent composition.
