101-109

Question 1

he axial postcontrast MRI shown was obtained in a patient with

A. acquired immunodeficiency syndrome (AIDS)
B. Chiari malformation
C. disk disease
D. neurofibromatosis
E. severe spinal cord trauma

Answer 1

A. acquired immunodeficiency syndrom (AIDS)

Yock case 1148, p. 702. Cytomegalovirus (CMV) is a frequent cause of polyradi-
culitis and myelitis in patients with acquired immunodeficiency syndrome
(AIDS). The pial enhancement seen is characteristic of this condition.

Question 2

A. giant-cell tumor
B. osteoblastoma
C. aneurysmal bone cyst
D. osteoid osteoma

Answer 2

D. osteoid osteoma

CNBR Fig. 3-257, p. 343. The lytic lesion with surrounding sclerosis and a
central nidus is classic for osteoid osteoma. These usually present with pain
that resolves with aspirin.

Question 3

this post contrast T1 weighted MRI illustrates

A. abscesses
B. gliomatosis cerebri
C. metastatic disease
D. multiple infarcts
E. neurofibromatosis type 2

Answer 3

E. neurofibromatosis type 2

CNBR Fig. 3-175. The bilateral acoustic neuromas and multiple meningiomas
are consistent with neurofibromatosis type 2.

Question 4

This postcontrast TI -weighted MRI illustrates a(n)

A. aneurysm
B. colloid cyst
C GBM
D. meningioma
E. metastasis

Answer 4

D. meningioma

Yock case 47, p. 29. A parafalcine meningioma is shown.

Question 5

A. abscess
B. artifact
C. hemangioblastoma
D. infarct
E. metastasis

Answer 5

D. infarct

Yock case 580, p. 360. A gyriform pattern of contrast enhancement in the
distribution of the left anterocerebral artery (ACA) is suggestive of subacute
infarction

Question 6

A. aneurysm
B. AVM
C. infarct
D. normal angiogram
E. persistent trigeminal artery

Answer 6

C. infarct

Osb 1 Fig. 9-38A, p. 283. Occlusion of the central sulcus artery is shown.

Question 7

A. type II fracture
B. usually requires surgery
C. requires traction
D. treated with external orthosis

Answer 7

D. treated with external orthosis

CNBR Fig. 3-298C Type I11 odontoid fractures usually heal well with an external
orthosis (e.g., halo, Somi. Minerva). Type I1 fractures will more often require
surgical stabilization, especially if there is more than 6 mm of displacement.

Question 8

A. abscess

B.lymphoma

C. multiple sclerosis

D. periventricular leukomalacia

E. tuberous sclerosis

Answer 8

B. lymphoma

Yock case 434, p. 271. Periventricular involvement by primary central
nervous system lymphomas is common.

Question 9

A. acute infarction
B. chronic subdural hematoma
C. epidermoid cyst
D. intracranial hypotension
E. Sturge-Weber syndrom

Answer 9

E. sturge - weber syndrom

CNBR Fig. 180C. The layer of enhancement covering the hypoplastic right
hemisphere represents the meningeal angioma.