DUBLIN, Ohio--(BUSINESS WIRE)--On Friday, July 22, 2011, it was disclosed in a private company press release that the U.S. Food and Drug Administration (FDA) had approved use of sulfur colloid (Kit for the Preparation of Technetium Tc99m Sulfur Colloid) to locate lymph nodes in breast cancer patients. This approval was stated to be based on a literature review of past clinical trials. Importantly, in gaining approval, this statement indicates that the performance of sulfur colloid was compared only to vital blue dye alone.