ArQule, Inc. (Nasdaq: ARQL) announced that the first patient was dosed in the registrational MOSAIC (Miransertib in Overgrowth Syndromes in Adults and Children) trial of its oral, selective pan-AKT inhibitor, miransertib, for the treatment of Proteus syndrome (PS) and PIK3CA-related Overgrowth Spectrum disorders (PROS).