Dr. Cruz is a clinical professor at The University of Texas Health Science Center at San Antonio and was the school’s first chief of surgical oncology. He received his surgical specialty training at the University of Minnesota. Dr. Cruz recently moved to semi-retired status after 35 years with the university. Dr. Cruz was principal investigator for the National Surgical Adjuvant Breast and Bowel Project at the Health Science Center, and helping prove that lumpectomy or segmental mastectomy was as effective as total mastectomy in cure rates and was less mutilating. He also was instrumental in promoting the blue dye-radioisotope sentinel node biopsy procedure on lymph nodes in a patient's axilla, which is now being widely tested throughout the U.S. and Canada.