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Figure 1 :Sural nerve biopsy demonstrating the characteristic supportive histologic features of CIDP with subperineurial edema (a, asterix), prominent thinly myelinated fibers reflecting de/remyelination (b), onion bulb formation (c, arrow), and mononuclear cell infiltration surrounding small vessels (V) in the endoneurium (d, arrow) and epineurium (e, arrow). The inflammatory cells are immunohistochemically lymphocytes (inset, d) and macrophages (inset, e). [a: HE × Obj.5, b: Kulchitsky Pal stain × Obj.10, c: HE × Obj.20, d: HE × Obj.10, d Inset: LCA × Obj. 40, e: HE × Obj.20, e Inset: CD-68 × Obj.40]

Figure 1 :Sural nerve biopsy demonstrating the characteristic supportive histologic features of CIDP with subperineurial edema (a, asterix), prominent thinly myelinated fibers reflecting de/remyelination (b), onion bulb formation (c, arrow), and mononuclear cell infiltration surrounding small vessels (V) in the endoneurium (d, arrow) and epineurium (e, arrow). The inflammatory cells are immunohistochemically lymphocytes (inset, d) and macrophages (inset, e). [a: HE × Obj.5, b: Kulchitsky Pal stain × Obj.10, c: HE × Obj.20, d: HE × Obj.10, d Inset: LCA × Obj. 40, e: HE × Obj.20, e Inset: CD-68 × Obj.40]