START Pediatrics is a specialized pediatric oncology clinical research unit located at HM Montepríncipe Hospital in Madrid—marking the first of its kind within Spain’s private hospital sector. Led by Dr. Marta Osuna Marco, a highly experienced pediatric oncologist and hematologist, the unit offers early- and late-phase clinical trial options for children and adolescents, ages 0-18 affected by cancer.

Designed with the child and family at its core, the facility offers a dedicated research area supported by a full team of specialists, including psychologists, physiotherapists, social workers, and educators. Housed within a hospital equipped with over 220 beds, ICU, emergency care, advanced imaging, and pediatric surgical expertise, START Pediatrics combines world-class infrastructure with a mission to advance pediatric cancer research—reinvesting trial proceeds to help drive future breakthroughs.