16 July, 2005 15:10 GMT
People with asthma or allergies may have a lower risk of glioblastoma multiforme, a type of brain cancer that affects three out of 100,000 people. That rate quadruples to 13 out 100,000 among people 65 and older.
Asthma, hay fever or other allergic conditions may reduce the risk of developing one fatal form of brain cancer, a US study suggests.
Variations in certain genes may make a person more prone to develop asthma or allergies and those same variations may protect adults against the most common kind of brain cancer, said study leader Judith Schwartzbaum, an associate professor of public health at Ohio State University.
Genetic Component
Glioblastoma multiforme affects three out of 100,000 people, a rate that quadruples to 13 out 100,000 among people who are 65 and older.
The study, published in the journal Cancer Research, is the first to include a genetic component in addition to participant self-reports of asthma and allergy.
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