J Neurosurg 143:1137–1148, 2025
Sixto Obrador Alcalde (1911–1978) is profiled as the architect of modern scientific neurosurgery in Spain, tracing his international training, prolific surgical career, and institutional leadership. The article documents his return from Anglo‑American mentorships to build neurosurgical departments, perform over 5,000 intracranial tumor surgeries, and publish extensively, emphasizing rigorous scientific practice and resident research training.
The paper reviews Obrador’s organizational achievements: founding Spanish neurosurgical units, cofounding SLEN, contributing to WFNS and EANS, and helping establish referral hospitals integrating clinical and basic neuroscience. It highlights his commitment to education, multidisciplinary collaboration, and translating Cajal’s scientific legacy into a national neurosurgical standard.
• Pioneer of Spanish Neurosurgery: Sixto Obrador (1911–1978) established neurosurgery as a distinct specialty in Spain, raising its scientific and clinical standards to international levels despite the country’s postwar hardships and late start due to the Spanish Civil War.
• Influence of the Cajal School: Obrador revived the scientific legacy of Santiago Ramón y Cajal and Pío del Río-Hortega, integrating neuropathology and neurophysiology into neurosurgical practice and emphasizing research as a core component of training.
• International Training and Mentorship: He received extensive training in neurophysiology and neurosurgery in the UK, US, and Mexico under renowned figures like Charles Sherrington, Hugh Cairns, Norman Dott, and John Fulton, which shaped his scientific approach.
• Institution Building: Obrador founded and organized several leading neurosurgical departments and hospitals in Madrid, including the first Institute of Neurosurgery, La Princesa Hospital, Fundación Jiménez Diaz, La Paz Hospital, and the Ramón y Cajal Hospital.
• Surgical and Scientific Output: He performed over 5,000 brain tumor surgeries, published more than 400 scientific papers, and authored Spain’s first neurosurgery textbook, establishing benchmarks for surgical outcomes and research in the field.
• Advances in Neurosurgical Techniques: Obrador introduced and developed techniques such as the first successful hemispherectomy in Europe, stereotactic procedures for movement disorders, and the use of intraoperative hypothermia, contributing to reduced mortality rates.
• Professional Leadership and International Collaboration: He co-founded the Portuguese-Spanish Society of Neurosurgery (SLEN), played key roles in the World Federation of Neurosurgical Societies (WFNS) and the European Association of Neurosurgical Societies (EANS), and promoted Spanish neurosurgery internationally.
• Legacy in Education and Research: Obrador’s main legacy is the integration of scientific research and multidisciplinary training in Spanish neurosurgery, influencing generations of neurosurgeons and establishing Spain as a respected center for neurosurgical excellence.
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