Introduction
The posterior fossa is a region of the skull base. Tumors which arise in this region are of particular importance, because important structures are located this area. Here the brainstem, the cerebellum, and ten of the twelve cranial nerves are located. This space is very limited, so that tumors rapidly can lead to major malfunctions. Neurosurgical operating in the posterior fossa requires the exact knowledge of the very complex neuroanatomy. Various tumor types - benign or malignant - occur in this region. Small brain tumors occur inchildrenmore frequently than tumors of the cerebral region. In adults, they account only for about 20% of brain tumors.
CaptionMRI image of a patient with lymphoma in the cerebellum (left) and a patient with a metastasis in the
cerebellum (right).
