1. Peripheral Nerve, Cross Section - PAS Stain
The patient's nerve biopsy is on the left half of the screen. The PAS
(periodic acid Schiff) stain highlights normal myelin. This low power
view, at which only myelinated fibers can be seen, shows how rare the
myelinated fibers in our patient's biopsy are, indicating
depopulation. The section on the right half of this image, for
comparison, is that of a relatively well-populated segment of
peripheral nerve. What is the significance of the patient's clinical
presentation? Compare with the typical clinical presentation of a
patient with Guillain-Barre syndrome.
Answer
