Dr. Guillermo de Velasco, an oncologist specializing in genitourinary tumors and melanoma, earned his medical degree from Complutense University in Madrid. He completed his residency at 12 de Octubre Hospital and received grants from ESMO and SEOM, conducting research at the University of Cambridge and Dana-Farber/Harvard Cancer Center. With over 100 published articles, he serves as an independent clinical researcher and assistant physician at 12 de Octubre University Hospital, leading trials and translational studies in renal carcinoma and other GU/melanoma tumors.