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A study covering ten years of mobile handset use found no increased risk of tumor growth among users.

British researchers for the Institute of Cancer Research have not found an increased risk of instances of acoustic neuroma, according to Reuters. Those are described as benign tumors growing on a nerve connecting the ear and the brain.

Periods longer than ten years may pose a greater risk; scientists cannot currently rule out that possibility. Concerns arose after other studies showed cellphone radiation may cause headaches and nausea.

"The results of our study suggest there is no substantial risk in the first decade after starting use," said Anthony Swerdlow of the Institute of Cancer Research in the report. "Whether there are longer-term risks remains unknown, reflecting the fact that this is a relatively recent technology."

The Institute's analysis focused on data collected from other studies throughout Britain and Scandinavian countries. Those were places where users were among the earliest adopters of mobile phones. Currently, about 2 billion people globally use cell phones.

David Utter is a staff writer for WebProNews covering technology and business. Email him here.