Sheryl Crow suspects that the benign brain tumor she was diagnosed with late last year was caused by cell phone usePeoplemagazine reported.

Crow said on the new talk show Katie that doctors have not told her that her tumor was caused by cell phone use, but she has “the theory that it’s possible that it’s related to that. I [used to spend] hours on the old archaic cell phones,” People reported:

Crow, who says the tumor is in a part of her brain near where she often held her phone, says she started to suspect something was wrong when she began spacing out on stage, forgetting lyrics and generally feeling “mushy.”

But is Crow right? Is it a fact that cell phones can cause cancer?

According to numerous studies and even an official classification from the World Health Organization: We’re not totally sure.

The WHO’s International Agency for Research on Cancer said last year that cell phone radiation is “possibly carcinogenic,” meaning that cell phone use might be associated with brain tumor risk, specifically for glioma.

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Read the full article at HuffingtonPost.com