Neuroradiology

Question 1

Answer 1

Saccular Aneurysm - mass projects medially from internal carotid artery

Question 2

Answer 2

Arteriovenous Malformation - L MCA Hypertrophied and gives multiple feeding vessels to the nidus

Question 3

Answer 3

Subarachnoid Hemorrhage - High density recent bleed with distribution/shape that rules out other types of hemorrhage

Question 4

Answer 4

Subdural hematoma - extra-axial collections of different signal intensities showing at least 3 different ages of subdural

Question 5

Answer 5

Infection - loss of distinction between endplates, disks, adjacent vertebral bodies on T1 and increased T2 signal

Question 6

Answer 6

Frontotemporal dementia - Note tau accumulation in frontal and temporal lobes

Question 7

Answer 7

Cavernous Hemangioma - speckled/popcorn appearance of mass lesion and heterogenous T2 and T1 signal

Question 8

Answer 8

Anoxia - necrotic globus pallidus enhances after gadolinium administration

Question 9

Answer 9

Hypothalamic hamartoma - midline mass of hypothalamus has typical appearance of hamartoma of tuber cinereum

Question 10

Answer 10

Acute Infarction - multiple regions of infarction in multifocal vascular distribution

Question 11

Answer 11

Chiari Malformation - cerebellar tonsils descend below foramen magnum

Question 12

Answer 12

Meningioma - Lesion is isodense on T1, enhances with gadolinium, compresses tip and medial aspect of temporal lobe

Question 13

Answer 13

Glioblastoma multiforme - SIngle, large, infiltrative multicystic enhancing mass surrounded by vasogenic edema

Question 14

Answer 14

Epidermoid Cyst - ovoid extra-axial mass has a cystic apperance, signal characteristics similar to CSF, reticulated linear foci within lesion

Question 15

Answer 15

Creutzfeldt-Jakob disease - note decreased diffusion in caudate and lenticular nuclei

Question 16

Answer 16

Multiple Sclerosis - elongated lesion demonstrating hyperintensity on T2 and focal demyelination

Question 17

Answer 17

Abscess - Gad enhancement shows focal corticomedullary nodule of enhancement that is the site of the lesion and the cause of the vasogenic edema

Question 18

Answer 18

Neurofibroma - pre and post-contrast T1 mass at the neural foramen of spine

Question 19

Answer 19

Ependymoma - rounded lesion in center of conus medullaris enhances with gadolinium

Question 20

Answer 20

Lymphoma - near homogenous enhancement (bright on diffusion-weighting) - and adjacent vasogenic edema

Question 21

Answer 21

Mesial Temporal Sclerosis - Atrophy in mesial temporal region and abnormal T2 weighted signal

Question 22

Answer 22

Pituitary Apoplexy - mass expanding in all directions particularly toward left, compression of trigeminal and oculomotor nerves in cavernous sinus

Question 23

Answer 23

Colloid Cyst - hyperintense rounded mass in the anterosuperior third ventricle

Question 24

Answer 24

Glioma - intra-axial pontine lesion, heterogeneously enhances and presence of moderate mass effect

Question 25

Answer 25

Developmental Venous Anomaly - venous drainage of brain tissue in which anomanly is situated

Question 26

Answer 26

Herniated Disc - mass lesion in anterior spinal canal and large disc extrusion continuous with L4-L5 disc

Question 27

Answer 27

Alzheimer Dementia - moderate to severe widening of cortical sulci and enlargement of lateral ventricles (in particular the temporal horns) indicative of temporal atrophy

Question 28

Answer 28

Toxoplasmosis - focal mass lesion of basal ganglia

Question 29

Answer 29

Amyloid angiopathy - two small hemorrhages shown in susceptibility weighted view and other punctate hemorrhages

Question 30

Answer 30

Acute hemorrhage within interhemispheric fissure and dependent portion of lateral ventricle