Peripheral Nervous System Pathology. (A) Paraffin-embedded transverse section of the sural nerve of patient 4 stained with hematxylin-eosin, showing perivascular infiltrate of mononuclear cells in the epineurium. (B) Paraffin-embedded longitudinal section of the radial nerve of patient 5, showing massive infiltrates of mononuclear cells in the epineurium. (C) Frozen tranverse section of the sural nerve of patient 7 stained with anti-CD45 antibody, showing a perivascular epineurial T-cell infiltrate. (D) Paraffin-embedded transverse section of the sural nerve of patient 8, stained with hematoxylin-eosin. Two middle-size vessels of the epineurium display the typical aspect of necrotizing vasculitis. Value of nerve biopsy in patients with latent malignant hemopathy and peripheral neuropathy: a case series: Duchesne M, Mathis S, Corcia P, Richard L, Ghorab K, Jaccard A, Magy L, Vallat JM - Medicine (2015). Not altered. CC.