Neuromuscular

Pseudo-Onion Bulbs

Circumferential Schwann cell processes & Axon sprouts



H&E stain
Whorled structures: Contain nuclei & connective tissue; Myelinated axon may be in center

VvG stain

Beaded axon sprouts extend circumferentially around central large axon

Neurofilament stain


Toluidine blue stain
Whorled structures: Central myelinated axon is present within some pseudo-onion bulbs

Toluidine blue stain

Toluidine blue stain

Interdigitated Schwann cell processes
Schwann cell processes may surround central axon or collagen

From: Chunyu Cai

Return to: Onion bulbs

5/3/2016