In this semithin section obtained from a peripheral nerve biopsy. The pathologic changes

1. Can be demonstrated by immunohistochemistry for P-component.

2. Usually associated with relative preservation of large myelinated axons.

3. The salient ultrastructural feature is straight, unbranched fibrils that are 7-10 nm in width.

4. The salient ultrastructural feature is paired helical filaments.

A. I, 2, and 3 are true.

B. Only 1 and 3 are true.

C. Only 2 and 4 are true.

D. Only 4 is true.

E. None of the above.

Answer and Discussion

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