Drop metastases (mnemonic)

The primary intracerebral malignancies that may cause drop metastases to the subarachnoid space are:

• glioblastoma (GBM) and anaplastic astrocytoma

• medulloblastoma

• sPNET

• ependymoma

• germinoma

• choroid plexus carcinoma

• pineoblastoma/pineocytoma

These can be remembered using this mnemonic:

• Gruesome Masses Progressively Extend Caudally

• MPEG

• GEM

• PPPG GAME

Mnemonic

Gruesome Masses Progressively Extend Caudally

• G: GBM, germinoma

• M: medulloblastoma

• P: pineocytoma, PNET

• E: ependymoma

• C: choroid plexus carcinoma

MPEG

• M: medulloblastoma

• P: pineocytoma, PNET

• E: ependymoma

• G: GBM, germinoma

GEM

• G: GBM, germinoma

• E: ependymoma

• M: medulloblastoma

PPPG GAME (#PUPG GAME)

• P: PNET

• P: Pineblastoma

• P: Pineocytoma

• G: GBM

• G: Germinoma

• A: Anablastic glioma

• M: Medulloblastoma

• E: Ependymoma