"Prostate, breast, lung and bowel cancers are common," says Pirkko Kellokumpu-Lehtinen, professor of oncology at the University of Tampere and chief physician at the Tampere University Hospital. "All other cancer types are rare, including childhood cancers."
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Thousands of Finns suffer from rare cancer
Maarit Leinonen, the chief medical officer at Finnish Cancer Registry, explains that the number of rare cancer diagnoses may vary from one up to more than 300 a year, with a cancer defined as rare if it has an incidence less than 1 in 20,000.