List the main types of glial cell intracranial neoplasms and their key imaging characteristics.

Astrocytoma: Often presents with a diffuse infiltrative pattern on MRI, with variable enhancement. Oligodendroglioma: Characterized by calcifications and a 'fried egg' appearance on histology, typically shows a cortical-based mass with enhancement. Ependymoma: Commonly located near the ventricles, may show a 'cap sign' on MRI with heterogeneous enhancement. Choroid plexus tumor: Typically arises in the ventricles, with vivid enhancement and potential for hydrocephalus. Clinical pearls include recognizing that low-grade gliomas may not enhance, and mimickers such as demyelinating lesions can complicate diagnosis.