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Are Brain Tumors Contagious?

Cancer is becoming less of mystery than it once was. For instance, researchers now know that there is a genetic predisposition for certain types of breast cancer. Now they've discovered that how many brothers and sisters you have, especially younger ones, could predict your chances of developing a brain tumor, because brain tumors may be "catching."

A new study analyzed over 13,000 Swedish brain tumor cases, and found people with four or more siblings were twice as likely to develop a brain tumor as people with no siblings. Researcher Andrea Altieri says, "Since the size of a family and the number of younger siblings correlate with the incidence of brain tumors, this suggests infectious agents may be causing the disease."

Art credit: freeimages.co.uk

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