Pinpointing the genes involved in human brain cancer can be like looking for a needle in a haystack, and sometimes the needle you find may not be the right one. By comparing human and canine genomes, researchers at North Carolina State University have discovered that a gene commonly believed to be involved in meningiomas-tumors that affect the meninges, or thin covering, of the human brain and account for one out of four adult brain tumors -may not be as key for tumor formation as previously thought, and they've narrowed the search for the real culprit.