Surgical approaches to posterior fossa tumours

Lesions of the fourth ventricle and foramen magnum can be difficult to manage surgically due to their proximity to critical brainstem structures. Understanding the anatomy of the fourth ventricle, lower cranial nerves, and basilar cisterns remains paramount for deciding surgical approaches to this location. Detailed preoperative workup and planning are necessary to minimize surgical morbidity and maximize tumour resection. This chapter provides an overview of the relevant anatomy and surgical techniques for lesions in the posterior fossa, specifically the fourth ventricle the foramen magnum. We will split this chapter into two main sections: microsurgical approaches to the fourth ventricle and skull base approaches to the foramen magnum.