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Biopsy of the left superficial fibular nerve: longitudinal sections, embedded in paraffin, stained with haematoxylin and eosin stain (A, B) (×270); immunolabelling of T-lymphocytes (anti-CD3) (C) (×540) and B-lymphocytes (anti-C20) (D) (×540): lymphocytic infiltrate with vascular tropism, with a majority of T-lymphocytes.
