History: A 35-year-old man presents with loss of strength in the fingers.
1. What should be included in the differential diagnosis? (Choose all that apply.)
a. Spinal cord arterial infarction
c. Amyotrophic lateral sclerosis (ALS)
e. Subacute combined degeneration
2. Which associated intracranial finding may be seen?
a. Hyperintense T2 signal in the callososeptal interface
b. Hyperintense signal in the splenium of the corpus callosum
d. Precentral gyrus hypointense signal and corticospinal tract hyperintense signal on T2-weighted images
3. In this disorder, which region of the cord is most likely to demonstrate marked atrophy?
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