Exam 8: Central Nervous System

In patients previously treated for brain neoplasms,who subsequently present with new neurologic complaints,distinguishing between radiation necrosis and tumor recurrence is relatively simple.

Since the introduction of CT,the overall mortality rate due to brain abscesses has decreased from more than 40% to less than:

Spheres,coils,or beads are used to embolize or occlude cerebral vasculature,as in the case of an aneurysm or arteriovenous malformation (AVM).

What is the most common cause of chronic meningitis?

Distinguishing clinical features of astrocytomas include:

Which of the following advanced MR imaging techniques is not useful in supporting a diagnosis of MS?

The appearance of craniopharyngioma tumors on both CT and MR depends on the solid and cystic components of the mass.

A ventricular shunt is placed between the ventricles and the _____ to drain excess CSF in patients diagnosed with hydrocephalus.

Recurrence is common with medulloblastomas,and chemotherapy regimens have not been found to be consistently effective in controlling the recurrence.

Antibiotics are often successful against many forms of meningitis,though antibiotic therapy is never given before a definite diagnosis has been established.

About 80% of all strokes are caused by small vessel disease.

Which of the following is the modality of choice for detecting cerebrovascular hemorrhage following acute head trauma?

The blood-brain barrier consists of a network of capillaries that connects the arteries and veins of the brain that prevent the passage of unwanted macromolecules and fluids from leaking into the brain parenchyma.

Which of the following is NOT one of three tumors of the peripheral nerve sheath?

A contrast-enhanced CT of the spine is the best imaging choice for postoperative patients in the evaluation of scarring when the tissue extends beyond the vertebral interspace.

A hemorrhagic stroke results from a rupture of a blood vessel of the brain due to a weakening in the diseased vessel wall.

Optimal detail of posterior fossa structures can be obscured by beam-hardening artifact associated with CT,making MRI the initial modality of choice for evaluating patients of all ages.

What are the three meningeal layers of the spinal cord,in order,from outermost to innermost?

Which of the following structures is NOT considered part of the brainstem?

In children,brain tumors often tend to occur in the: