Primitive neuroectodermal tumour

Primitive_neuroectodermal_tumour, abbreviated PNET, is an uncommon neuropathology tumour.

It is also known as primitive neuroepithelial tumour. (???)

General

• Should not be confused with peripheral primitive neuroectodermal tumour (abbreviated pPNET), AKA Ewing sarcoma.

Microscopic

Features:

• Small round blue cell tumour - see medulloblastoma.

DDx:

• Embryonal tumour with abundant neuropil and true rosettes (ETANTR).

Images

www:

• Primitive neuroectodermal tumour - several images (upmc.edu).
• GBM with PNET component - several images (upmc.edu).

See also

• Neuropathology tumours.