The purpose of the patent system is to promote the progress of science and useful arts.  Currently, more than 20% of all human genes are patented and about half the genes involved in cancer are patented. These gene patents are limiting the performance of genetic tests and patient access to genetic testing services. Dr. Debra Leonard with Weill Cornell Medical College discusses the debate about whether genes should be patentable, and whether elimination of gene patents will benefit patients or harm research and development of genetic discoveries. From the Series:Laboratory Medicine Grand Rounds