LOS ANGELES--(BUSINESS WIRE)--CytRx Corporation (NASDAQ: CYTR), a biopharmaceutical research and development company engaged in the development of high-value human therapeutics, today provided a favorable progress update for its ongoing Phase 2 STAR-1 registration clinical trial to evaluate the efficacy and safety of orally administered tamibarotene as a third-line treatment for acute promyelocytic leukemia (APL).