1. Answer: B. ADEM is a nonvasculitic inflammatory demyelinating condition that is very similar to MS but can be differentiated by clinical features and laboratory tests.

2. Answer: C. Around 80% of childhood cases of ADEM occur under the age of 10. Less than 20% of cases occur in the second decade of life.

3. Answer: E. All of the above help distinguish ADEM from MS. Also, there are often less posterior column abnormalities, which is more common in MS patients.

4. Answer: B. Uveitis, iritis, aortitis, pulmonary fibrosis, amyloidosis, and inflammatory bowel disease are all associated conditions. More men are affected than women, and only approximately 1% of the population is affected with this condition.

5. Answer: E. Ninety percent to 95% of patients have this antigen. This test is most helpful when the diagnosis is not clear.

6. Answer: A. Approximately 10% to 15% of patients can have recurrence of Bell’s palsy on the ipsilateral side or the contralateral side of the initial palsy. Recurrence typically occurs in patients with a family history of recurrent Bell’s palsy. Some patients with recurrence were found to have tumors of the seventh nerve or inflammatory or demyelinating disease. Patients with diabetes are more likely to have recurrence as well.

7. Answer: C. Pregnant women are more likely to be affected. The sexes are equally affected, and the highest incidence is in persons older than age 60.

8. Answer: E. All patients with Behçet’s disease will have an associated oral aphthous ulceration. Approximately three fourths of patients will have genital aphthous ulceration.

9. Answer: B. The clinical hallmark of the disease is the recurrent neurologic deficits that are disseminated in space and time.