MENINGIOMA
X) Imaging - CT scan kepala * non-contrast: brain slightly hyperdense to normal brain, calcification, variable adjacent oedema * post-contrast: brightly and homogeneously contrast enhance, malignant or cystic variants demonstrate more heterogeneity/less intense enhancement, hyperostosis (typical for meningiomas on the base of the skull) * lytic/destructive regions are seen particularly in higher grade tumours but should make one suspect alternative pathology (e.g. haemangiopericytoma or metastasis) MRI As is the case with most other intracranial pathology, MRI is the investigation of choice for the diagnosis and characterisation of meningiomas. When appearance and location are typical, the diagnosis can be made with a very high degree of certainty. In some instances, however, the appearances are atypical and careful interpretation is needed to make a correct preoperative diagnosis. Meningiomas typically appear as extra-axial masses with a broad dural base. The...