“…The relationship of these tumors to critical neurovascular structures (namely the circle of Willis, optic pathways, and the hypothalamus) results in potential significant morbidity and mortality associated with surgical access (Adamson et al, 1990;. Additionally, even though 90% of tumors arise in the sellar and parasellar regions, they can originate anywhere along the obliterated craniopharyngeal duct, including the nasopharynx, sphenoid bone, third ventricle, pineal region, infrasellar region, and cerebellopontine angle (Falavigna and Kraemer, 2001;Ragel et al, 2007). As understanding of the anatomic variability of this tumor has grown through the use of advanced microsurgical, skull base, and endoscopic techniques, so too has the surgical armamentarium.…”