Most craniopharyngiomas are located in the saddle, most of which protrude into the third ventricle; very few can be confined to the saddle, and rare cases can be seen in the posterior cranial recess. yasargil et al. (1990) classified craniopharyngiomas into six types: intra-saddle, intra-saddle-supra-saddle, supra-saddle or optic cross-extra-ventricular, intra- and extra-ventricular, paraventricular and intra-ventricular. Fahlbusch et al. (1996) classified craniopharyngiomas into three types according to their relationship to the saddle septum: 1. located within the saddle (supra-saddle) under the saddle septum; 2. located in the supra- or post-saddle (supra-saddle septum, extra-ventricular); 3. located within the ventricles (third ventricle). Raimondi (1983) classified it into five types: 1.Intrasellar type: the tumor is confined to the saddle, surrounding structures such as the pterygoid sinus, cavernous sinus and intra-saddle bone can be invaded or destroyed. 2.Pre-optic cross type: The tumor can extend from the saddle to the pre-optic cross or originate in the saddle and extend into the pre-optic cross area. 3.Posterior optic cross type: The tumor is located between the optic cross and optic tract, and can invade or displace the hypothalamus and the third ventricle. 4.les formes geantes type: The tumor is huge and extends into the anterior and posterior regions of the optic cross at the same time, and even extends into the inferior curtain or lateral fissure. 5.Atypical type: The tumor may be located in the pharynx, posterior cranial fossa, and also confined in the pterygoid sinus or extended to the pineal region. Domestic Roche (1981) divided craniopharyngioma in children into three types: suprasellar type (32.6%); ventricular type (52.8%) and other types (14.5%), the latter including those developing to the posterior saddle, lateral ventricle, anterior cranial recess, temporal lobe and parsaddle. The blood supply of craniopharyngioma is mainly from the anterior cerebral artery, anterior communicating artery, internal carotid artery or posterior communicating artery. Intrasellar tumors mainly receive blood from branches of the internal carotid artery on both sides of the cavernous sinus; extrasellar tumors receive blood from small branches of the anterior communicating artery and the adjacent anterior cerebral artery anteriorly; laterally, they receive blood from branches of the posterior communicating artery. Extra-ventricular tumors receive blood from the beginning of the posterior cerebral artery.