岩斜区肿瘤是指起源于岩上、岩下窦之间的岩骨斜坡裂的肿瘤。岩斜区内侧至斜坡中线,外侧至内耳孔和颈静脉孔,上方至鞍背,下界为枕骨大孔上缘,前界为岩斜区硬膜,后界为脑干。肿瘤的基底位于岩斜裂,肿瘤可侵及岩尖、小脑幕切迹、Meckel’s腔、鞍旁和海绵窦;向下、向外可累及内听 Petroclival tumors refer to tumors of petrous bone that originate from the rock and that underlie the petrosal sinus. From the medial side of the rock slope to the midline of the slope, the inner ear hole and the jugular foramen lateral to the upper part to the saddleback, and the lower part to the upper edge of the foramen magnum. The anterior boundary is the petroclival dura and the posterior part is the brainstem. The base of the tumor is located in the petroclival, the tumor can invade the petrous apex, the notch of the tentorium, the Meckel’s cavity, the parasellar and the cavernous sinus;