Anaplastic ependymoma (WHO grade III), in an 18 month old infant

There is a large enhancing extra-axial mass lying within the 4th ventricle and extending into the foramen of Luschka on the left. Heterogeneity of the lesion with cystic and necrotic areas is characteristic, along with the previously described findings. Most patients are one to five years in age, and present – as this child – with obstructive hydrocephalus (headache, nausea, and vomiting). This is the third most common posterior fossa tumor of childhood, after pilocytic astrocytoma and medulloblastoma (posterior fossa PNET).

Anaplastic ependymoma (WHO grade III), in an 18 month old infant

Part of the on-line supplement to Neuroradiology – The Essentials with MR and CT (© 2015)