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John Duncan, III, MD, PhD

John Duncan III, MD, PhD, is the chief of neurosurgery at Rhode Island Hospital, Hasbro Children's Hospital, and The Miriam Hospital in Providence, Rhode Island. He is also an associate professor in the department of clinical neurosciences (neurosurgery) and the department of pediatrics at Brown Medical School, where he also directs the neurosurgery residency training program.

He specializes in neuro-oncology, epilepsy surgery, and pediatric neurosurgery. His practice includes many patients with tumors of the brain or spinal cord. He also treats people with deformities such as Chiari malformation, spina bifida, tethered cord and hydrocephalus.

Duncan led a medical and surgical team that performed a groundbreaking type of surgery on the world's youngest patient. The new form of inoperative radiation therapy (IORT) called INTRABEAM was used to prevent recurrence of a metastatic brain lesion in a 4-year-old boy. The patient was the youngest in the world to receive radiation therapy during surgery for a brain tumor.

Duncan received his medical degree from Rutgers University, where he also earned a PhD in physiology. He went on to Stanford University for an internship in general surgery, followed by residencies there in neuropathology and neurological surgery. Subsequently, he completed two fellowships: one in neurology at London's National Hospital, the other in pediatric neurosurgery at Toronto's Hospital for Sick Children.