Abstract
The recent introduction of embolization beads (microspheres) into the Japanese market has generated intense clinical interest. Microspheres are often used for therapeutic purposes of primary hepatocellular carcinoma, and there are still limited opportunities to treat other tumors using microspheres. In this paper, we review the applications of microspheres to various tumors other than primary hepatocellular carcinoma, with a focus on liver metastases and bone tumors.