Dr. Mahmoud Messerer is Associate Professor in Department of neurosurgery in Centre Hospitalier Universitaire Kremlin-Bicetre at Paris Sud University, France. He is also Staff Neurosurgeon in Department of neurosurgery at Centre Hospitalier Universitaire Vaudois in Switzerland. After starting his specialization in neurosurgery in France at the Center Hospitalier Universitaire in Rennes and then at the Hospices Civils in Lyon, he completed his training at the CHUV. Between 2014 and 2015, Dr. Messerer subsequently performed a subspecialization in the surgery of intramedullary tumors at the Hopital Bicetre (University Paris Sud) and in pediatric surgery at the Necker Hospital. Dr. Messerer is very invested in the clinical research, he realizes many works centered on the endoscopic surgery of the base of the skull. He is also a founding member of a research unit on the diameter of the optic nerve and its relationship with intracranial hypertension. He is also interested in the history of medicine and in collaboration with Professor Barras he prepares a thesis on the history of neurosurgery.