It's only a short letter buried in the back pages of a journal, but it could change the entire cell phone–cancer controversy.
A group at Hebrew University in Jerusalem has reported a sharp increase in the incidence of parotid gland tumors in Israel over the last 30 years. Rakefet Czerninski, Avi Zini and Harold Sgan-Cohen found that these tumors have quadrupled since 1970, "with the steepest increase" after 2001 (see plot below). Their letter appears in the January 2011 issue of Epidemiology; it's a free download. They are with the Hadassah School of Dental Medicine at the university.