Scientists have focused on the potential risk of brain cancer when phones are held against the user's ear.
科学家一直把目光集中在手机使用者得脑癌的潜在危险，因为手机一般是被拿到耳朵旁边的。
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One local mom, Melinda Reilly of Orinda, reacted cautiously to Dr. Herberman's warning about children's cancer risk. "I got myself, my husband, and daughter ear buds," she said.
A variation in a gene already associated with breast cancer risk is also linked with especially unpleasant underarm body odor and wet ear wax, according to a team of Japanese scientists.