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(CNN) The incidence rate of aggressive malignant brain tumors in England has more than doubled in recent decades, and a new study questions what could be driving that rise.
The rate of glioblastoma climbed from 2.4 to 5.0 per 100,000 people in England between 1995 and 2015, according to the study, published Wednesday in the Journal of Environmental and Public Health.
The data analyzed in the study only reflect trends in brain cancer cases and do not shed light on why these trends could have occurred, but the researchers pointed to examples of lifestyle factors that they think could have played a role.
Among those factors, they briefly referenced previous studies on cell phone use possibly being associated with brain tumors and changes in the brain.
“The paper itself is not about cell phones; it’s just about this change in the tumors … but cell phones seem like really they’re the most likely cause,” said Alasdair Philips, lead author of the study and a trustee of Children with Cancer UK.
The tumors “primarily are in the frontal and temporal lobe areas, by your ear and forehead,” which raises the cell phone suspicion, he said.
Read more: CNN