Anyone who could be put off a life-saving treatment should probably relax, at least for now. The procedure used by the Hospital de Egas Moniz in Lisbon was unorthodox and bypassed a process that would have grown specific cells in a lab before implantation. Instead, the clinic simply inserted parts of the nasal lining straight into the spine, which is most likely why the tumor was able to form. Despite this, a 2010 report on this same trial found that there may be benefits to the procedure, with some subjects actually seeing positive results. Either way, now that the problem has come to light, the University of Iowa's Brian J. Dlouhy, who removed the tumor, has suggested that all stem cell trial patients should be given much more attention after their surgery to ensure this is a one-off event.