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44 Cards in this Set

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Category DDX for intracranial mass lesion
• Tumor
• Edema
• Abscess
• Cyst, contusion
• Hematoma
TEACH
EXTRAAXIAL MASS, cerebral hemisphere
• Meningioma
• Metastases
• Lymphoma
• Arachnoid cyst
• Dermoid/epidermoid
• Other: hemorrhagic, infectious fluid collections
MMy LAD/E
Extraaxial Mass of the Clivus/prepontine cistern
Metastases
Meningioma
Chordoma
Chondroma
Chondrosarcoma
MMCCC
CP angle mass
• Neuroma (VIII, NV, NVII)
• Aneurysm
• Meningioma
• Epidermoid
• Paraganglioma
• Other (arachnoid cyst, lipoma, dermoid less common)
• Metastases
• Petrous apex cholesterol cysts
NAME POMP
INTRAAXIAL MASS OF THE CEREBRAL HEMISPHERE
• Glioblastoma
• Oligodendroglioma
• Astrocytoma
• Lymphoma
• Metastases
• PNET
• Ganglioma/cytoma
GOAL MPG
INTRAAXIAL MASS OF THE SELLA
• Metastases
• Abscess
• Craniopharyngioma/Rathke's cyst
• EG stalk

• Sarcoid
• Adenoma
MACE SAm
INTRAAXIAL MASS OF THE BRAINSTEM
• Astrocytoma
• Glioblastoma
AG
INTRAAXIAL MASS OF THE CEREBELLUM
Hemangioblastoma
Astrocytoma
Medulloblastoma
Metastases
Ependymoma
Choroid plexus papilloma or carcinoma
HAMMEC
INTRAAXIAL MASS OF THE PINEAL REGION
• Germ cell tumor
• Pineal parenchymal cell tumor
GP
Multiple Intracranial Lesions - Tumor
• Metastases
• Multicentric glioma
• Lymphoma
MML
Multiple Intracranial Lesions - Infection
• Fungus
• Abscess
• Cysticercosis
• Toxoplasmosis
FACT
Multiple Intracranial Lesions - Vascular
Vasculitis
Diffuse axonal injury
Hemorrhage
Embolic infarctions
Contusions
Hemangiomas
VD HECH
CORPUS CALLOSUM LESIONS
Malignancy (GBM, Lymphoma)
Lipoma
MS
PML
Marchiafava-Bignami dz (EtOH)
Infarct
MMM LIP
INTRASELLAR MASSES
• Craniopharyngioma
• Aneurysm
• Pituitary adenoma
• Cysts (Rathke 's cleft, pars intermedia)
• Abscess
• Pituitary apoplexy
• Metastasis
CAP CAP M
SUPRASELLAR MASSES
• Sellar lesion with superior extension, sarcoidosis
• Aneurysm, arachnoid cyst
• Teratoid lesions
Germ cell tumors
Epidermoid/dermoid
• Craniopharyngioma
• Hypothalamic glioma
• Metastases, meningioma
• Optic nerve glioma
• EG
SSAATCHMMOE
SUPRASELLAR MASS - ADULT
• Macroadenoma (most common)
• Meningioma
• Glioma
• Craniopharyngioma
• Aneurysm (rare, but important)
MMGCA
SUPRASELLAR MASS - CHILD
• Craniopharyngioma (most common)
• Hypothalamic hamartoma
• EG
• Glioma (optic nerve, chiasm, hypothalamus )
• Germinoma
CHEGG
Lateral Tumor of the Cerebellar Hemisphere
Astrocytoma
1
Anterior Tumor of the Posterior Fossa
Brainstem Glioma
1
Midline Posterior Tumor of the Posterior Fossa
Medulloblastoma
1
Posterior Fossa Tumor with a Cystic Component
• Juvenile Pilocytic astrocytoma
• Hemangioblastoma
2
Posterior Fossa Tumor in an Adult
Schwannoma
Hemangioblastoma
Astrocytoma
Meningioma
Metastases
Epidermoid)
SHAMME
Posterior Fossa Tumor in a Child
• Cerebellar astrocytoma
• Brainstem glioma
• Medulloblastoma
• Ependymoma
AGME
BRAIN TUMORS IN INFANTS (< 2 YEARS)
• PNET (primary cerebral neuroblastoma)
• Anaplastic astrocytoma
• Choroid plexus papilloma /carcinoma
• Teratoma (most common)
PACT
Lateral Ventricle Tumor, 0-15 yo
PNET
Choroid plexus papilloma2
2
Lateral Ventricle Tumor, 15-30 yo
Glioma
JPA
2
Lateral Ventricle Tumor, >30 yo
• Central neurocytoma
• Astrocytoma
• Metastases
• Oligodendroglioma

• Subependymoma
• Meningioma
CAMO SaM
Third Ventricle Tumor, 0-15 yo
• Extrinsic
craniopharyngioma
• Astrocytoma
• Germinoma
• EG of stalk
CAGE
Third Ventricle Tumor, 15-30 yo
Colloid Cyst
1
Third Ventricle Tumor, >30 yo
Glioma
Mets
Pituitary/Pineal Mass
Aneurysm
Sarcoid
GMPAS
4th Ventricle Tumor, 0-15 yo
• Ependyoma
• Medulloblastoma
EM
4th Ventricle Tumor, 15-30 yo
• Choroid plexus papilloma
1
4th Ventricle Tumor, >30 yo
Hemangioblastoma
Metastases
Subependymoma
HMS
Cystic Neoplasms
• Cystic astrocytoma/GBM
• Hemangioblastoma
• Metastases: squamous cell carcinoma
HAM
TUMORS WITH CSF SEEDING
Choroid Plexus Papilloma/CA
Ependymoma
PNET
Germinoma
GBM
CEPGG
BRAIN LESION - HYPERDENSE ON CT DUE TO HIGH CELL DENSITY
Lymphoma
PNET
Ependymoma
Germinoma
BRAIN LESION - HYPERDENSE ON CT DUE TO HEMORRHAGIC TUMOR
GBM
Mets: ChorioCA, Thyroid, Melanoma, RCC, Lung
G CT/MR L
BRAIN LESION - HYPERDENSE ON CT DUE TO CALCIFICATION
Mucinous metastases
All osteogenic tumors
2
T2 Hypointense lesions
Blood degradation products
melanin
calcification
dense celluarity
fibrous tissue
high [protein]
flow void
BMCC FFP
T1 hyperintense lesions
contrast
MetHb
melanin
fat
very high [protein]
slow flow
CMMFVS
MULTIPLE RING ENHANCING LESIONS
mets
abscess
glioma/granuloma
infarct
contusion
demyelination
resolving infarct
MAGIC DR
Diffuse meningeal enhancement
meningitis
carcinomatosis
post-operative
SAH
Intracranial hypotension
MCPSI
basilar meningeal enhancement
infection (TB, fungal, pyogenic, cysticercosis)
tumor (lymphoma, leukemia, carcinomatosis)
inflammatory (sarcoid, RA, whipple's)
ependymal enhancement
tumor (lymphoma, mets, CSF seeding from PNET or GBM)
infection (meningitis or CMV)
inflammatory (post-shunt or hemorrhage)