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28 Cards in this Set

  • Front
  • Back
Ring enhancing lesion



Glioma and other primary CNS neoplasms (eg, lymphoma)



Demyelination (multiple sclerosis, acute disseminated encephalomyelitis)

Resolving hematoma/radionecrosis
DDx cavernous sinus mass
Cavernous sinus MAMS




Schwannoma (CN 3-6)
Cavernous sinus mass surrounding the cavernous portion of ICA and compressing it
MENINGIOMA is what does this
Temporal lobe lesion with cystic and solid component
PXA, and ganglioglioma as well as JPA, which can be anywhere
brain tumor with calcification
Oligodendroglioma, ependymoma, meningioma, choroid plexus tumor, craniopharyngioma
calcified mass supratentorial with invovement of brain, extension to ventricle
ependymoma, oligo
location of Interventricular meningioma
trigone of lateral ventricle
Hemorrhagic brain mets
The 2 most common (lung, breast), the 2 most aggressive (renal cell, thyroid), the 2 most colorful (melanoma, choriocarcinoma)
differential diagnosis for multiple enhancing brain masses
metastatic disease, abscess, TB, demyelinating disease, lymphoma
lymphoma appearance
homogeneous tumors so homogeneous appearance. Low signal on T2. ALWAYS CONTACTS VENTRICULAR SURFACE. OR DURAL SURFACE.
Intraaxial lesion contacting dura with clear dural enhancement
Lymphoma or metastases
Low T2 signal lesions
cellular tumors -- lymphoma, medulloblastoma/PNET, Pineoblastoma, meningioma
Septum pellucidum based mass
Subependymoma, septal low grade glioma, central neurocytoma.
How differentiate these 3?
Central neurocytoma enhances (albeit irregularly, in nodular fashion). Subependymoma and low grade gliomas DO NOT enhance.
Child with Mass in reaching the fourth ventricle
medulloblastoma versus and Tamone.
Differentiating these two?
a tender moment has tumor extension through fourth ventricular outflow pathways. Medulloblastoma never does this. BOTH in results in CSF dissemination, however, medulloblastoma is more common for doing this.
Pediatric posterior fossa mass, with satellite lesions
think medulloblastoma.
Tumor with CSF dissemination
pineoblastoma, medulloblastoma/PNET, choroid plexus carcinoma, and ependymoma
pediatric lateral ventricular mass
choroid plexus papilloma
choroid plexus papilloma in adults
posterior fossa
Mass in body of lateral ventricle
choroid plexus tumor (papilloma or carcinoma), metastatic disease. Unlikely to be meningioma these occur at trigone/atrium.
Suprasellar cistern mass
don't know what it is? If it has calcium in it or high T1 signal, its a cranio.
Mass positive on DWI
Epidermoid cyst, abscess, mucinous adenoCA metastasis, Cellular tumors (lymphoma, PNET, meningioma)
Big ugly mass
Midline mass
DERMOID. Make sure its not a dermoid. Can happen just below lateral vents and when they rupture, fat goes into the vents
large area of edema in temporal lobe with increased DWI
THINK HERPES on boards. Not stroke.
Tumefactive demyelinating lesion
Can enhance bright. Not synonomous with MS.
Brain mass
Think about things besides brain TUMOR. Think about MS, think about herpes, think about abscess, think about dermoids, etc.