CHICAGO, June 2, 2008 (PRIME NEWSWIRE) -- Immunomedics, Inc. (Nasdaq:IMMU), a biopharmaceutical company focused on developing monoclonal antibodies to treat cancer and other serious diseases, today announced that epratuzumab labeled with the potent radioisotope, yttrium-90 (Y-90), produced significant clinical results when given in small fractionated doses repeatedly to patients with non-Hodgkin’s lymphoma (NHL) in a multicenter, open-label, dose escalation study.