The presenting features can be classiﬁed under:
• Raised intracranial pressure
• Focal neurological signs
The duration of the symptoms and the progression and evolution of the clinical presentation will depend on the grade of the tumour—that is, its rate of growth. A patient presenting with a low-grade astrocytoma (Grade I or II) may have a history of seizures extending over many years, antedating the development of progressive neurological signs and raised intracranial pressure. The tumours may evolve histologically into the more malignant anaplastic astrocytoma or glioblastoma multiforme. Patients with the higher-grade tumours present with a shorter history and glioblastoma multiforme is characterized by a short illness of weeks or a few months.