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Fellowships that shape the career

• Spine

  Where most of the work and most of the money is. Backs and necks, not brains.

• Cerebrovascular

  Aneurysms and bleeding in the brain, increasingly done through a catheter rather than an opening.

• Pediatric neurosurgery

  Children's hospitals only. Smaller anatomy, different diseases, and parents in the room.

• Skull base and tumor

  Long operations alongside ear, nose and throat surgeons. Technically the most demanding work there is.