# neurosurgery medicalillustration ulcerativecolitis hepatocellularcarcinoma colorectalcancer cholangiocarcinoma barrettsoesophagus autoimmunehepatitis hepc

The evolution of transsphenoidal surgery. First, transnasal approach to skull base by Egyptian embalmers, then Cushing with sublabial approach, third Guiot with fluoroscopic guidance, fourth Hardy with microscope and finally the endoscopy.

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2018-04-13