Cancer clinical trials using proton therapy are ongoing, with about 25 under way in the United States.
According to current information from the National Institutes of Health (NIH), several studies are in the data collection phase, while others are recruiting patients. A total of about 1,470 participants have been recruited or are being sought for cancer studies involving proton therapy. A number of cancers may be effectively treated with protons exclusively or in combination with other therapies.
The chart at right offers a quick snapshot of current U.S. cancer clinical trials being conducted using either of these methods. These trials, along with more effective reporting mechanisms (e.g. web-based system allowing long-term patient reporting) are important to continue to assess the effectiveness of proton therapy for numerous cancers, as well as quality of life and the incidence and severity of treatment related side effects.