CAMBRIDGE, Mass.--(BUSINESS WIRE)--ARIAD Pharmaceuticals, Inc. (NASDAQ: ARIA) today announced interim results of a randomized, open-label, active-control multicenter Phase 2 study of oral ridaforolimus, an investigational mTOR inhibitor, in patients with metastatic or recurrent endometrial cancer. Based on this interim analysis, the study demonstrated a statistically significant improvement in the primary endpoint of median progression-free survival (PFS) in patients receiving single-agent ridaforolimus compared to patients receiving standard-of-care treatment. The data were presented Saturday in the Plenary Session of the 13th Biennial Meeting of the International Gynecologic Cancer Society being held in Prague, Czech Republic. Ridaforolimus is currently being developed by Merck in multiple cancer indications under an exclusive license and collaboration agreement with ARIAD.