.

Positivity is seen at neuromuscular junctions

Components of Auerbach’s plexus are positive ( ganglia and individual intramuscle nerve fibres)

Frontal cortex.

Positivity is not confined to soma; it extends into the dendrites of the pyramidal neurones.

Specific?

Macrophage/respiratory epithelium positivity.

Note that smooth muscle of the vein ( upper right) is negative.