NEW YORK, Jan. 3, 2013 (GLOBE NEWSWIRE) -- TG Therapeutics, Inc. (TGTX) today announced that the U.S. Food and Drug Administration (“FDA”) has cleared its Investigational New Drug (“IND”) Application for TGR-1202, the Company’s novel, highly specific PI3K-Delta inhibitor being developed jointly with Rhizen Pharmaceuticals, S A.