A mixed neuronal-glial tumour representing a histological spectrum of the same tumour. They are usually supratentorially located, large, cystic masses with a peripheral solid component, characterised by prominent desmoplastic stroma and pleomorphic populations of neoplastic cells with either astrocytic or ganglionic differentiation and poorly differentiated cells in variable proportions. They usually present in the first 18 months of age with rapid head growth, bulging anterior fontanel and bone structures over the tumour, signs of raised intracranial pressure (headache, vomiting, papilloedema), focal neurological signs and sometimes seizures. [from
SNOMEDCT_US]