COLUMBUS , Ohio Having asthma, hay fever or another allergic condition may reduce the risk of developing one fatal form of brain cancer, a new study suggests.New evidence for this relationship is found in the normal variation of two genes, the scientists say.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 Judith Schwartzbaum, the study’s lead author and an associate professor of public health at Ohio State University .
