A 67-year old patient presenting with esophageal cancer has been treated at the Paul Scherrer Institute PSI with a form of radiation provided by protons, i.e., positively charged particles. This is the first time this type of radiotherapy has been used in Switzerland to treat an esophageal tumor.
The five-week course of treatment is part of a European clinical trial involving both PSI and University Hospital Zurich. Medical researchers are investigating whether
In most cases the treatment involves a combination of chemotherapy and radiation, followed by surgery to remove any tumor residue and the surrounding lymph nodes. Since the excision of the tumor also requires the removal of a part of the esophagus, the remaining healthy parts are subsequently connected with the stomach.
Both protons and photons can damage the DNA in tumor cells, killing them off. Although X-rays can be targeted at tumors with great precision nowadays, they also tend to affect the surrounding healthy tissue and may cause damage.
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