South Texas Oncology and Hematology

South Texas Oncology and Hematology, PLLC, widely known as The START Center for Cancer Care, is a premier oncology and hematology practice and research organization based in San Antonio, Texas. Founded in 1985, the center provides a full spectrum of cancer care, including medical, surgical, and radiation oncology, alongside specialized hematology services for blood disorders. It is globally recognized for its early-phase clinical research through The START Center for Cancer Research, which operates one of the world's largest Phase I clinical trial programs for novel anti-cancer agents. The organization maintains multiple clinical sites in South Texas and has expanded its research footprint internationally to locations such as Madrid and Shanghai. In 2025, the practice entered into a strategic partnership with OneOncology to further enhance its clinical and operational resources.