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Radiology · MRI: multiple sclerosis
Sample itemWhich MRI distribution is most characteristic of multiple sclerosis plaques?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Periventricular ovoid lesions oriented perpendicular to the ventricles
Multiple sclerosis commonly produces ovoid demyelinating lesions in characteristic locations including periventricular, juxtacortical, infratentorial, and spinal regions. Periventricular lesions may be oriented perpendicular to the ventricles.
Option by option
A. Isolated calcified basal ganglia lesion
A solitary basal ganglia calcification is nonspecific and not the usual plaque pattern.
B. Periventricular ovoid lesions oriented perpendicular to the ventricles (correct)
Correct. This distribution reflects typical demyelinating plaque morphology.
C. Diffuse skull thickening
Skull thickening is not a typical MS finding.
D. Single epidural collection only
An epidural collection suggests a different spinal or infectious process.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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