Embryonal tumors

Embryonal tumors Classifiaction

• • medulloblastoma. Variants:

    • desmoplastic/nodular medulloblastoma

    • anaplastic medulloblastoma

    • large-cell medulloblastoma

    • medulloblastoma with extensive nodularity

  • CNS primitive neuroectodermal tumors (PNET)

    • CNS neuroblastoma

    • CNS ganglioneuroblastoma

    • medulloepithelioma

    • ependymoblastoma

  • atypical teratoid/rhabdoid tumor (AT/RT)

Primitive neuroectodermal tumors (PNETs) are often classified based on their location above or below the tentorium cerebelli.

Those located below the tentorium are medulloblastomas, whereas those that are above are known simply as supratentorial PNETs (sPNETs).

Some further subclassify sPNETs into cerebral (previously known as cerebral neuroblastoma) and pineal, AKA a pineoblastoma.