Particle stents for esophageal cancer have certain hazards, mainly because of the radioactivity of the particles, which may last for a longer period of time, which is a side effect in addition to the therapeutic effect of the particle stents. This side effect may cause some radioactivity to other tissues and organs of the body and the environment around oneself, or to family members and other patients in the same ward, but the radioactivity is generally controlled within a certain range. After stenting, some hospitals will cover the stent with a lead blanket to prevent excessive release of such radioactive materials into the surrounding environment or other damage to family members. Usually the patient is kept in a separate room after the particle stent is placed to reduce the damage to other patients. Generally, the peak radiation level will decrease in about a week, so there is no need to worry too much about the long term damage caused by the particle holder, which is mainly therapeutic.