Table 1. Features to be described in any nerve biopsy report.

Status of the epineurium including blood vessels

Alterations of the perineurium (thickening, fibrosis, calcification)

Endoneurial edema

Density of large and small myelinated nerve fibers

Extent of axonal degeneration and atrophy

Frequency of bands of Büngner and macrophages containing myelin debris

Number of macrophage clusters (CD68 staining)

Regeneration clusters

Demyelinated/remyelinated fibers

Onion bulb formations

Inflammatory infiltrates

Presence/absence of amyloid