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Images showing fibrinoid deposits stained by Phosphotungstic acid haematoxylin (PTAH) technics in the vein adventitious layer (arrow and asterisk) in the patient groups NR<50 (A), NR≥50 (B), R<50 (C) and R≥50 (D). NR<50: patients without reflux younger than 50 years, NR≥50: patients without reflux with 50 years or older, R<50: patients with reflux younger than 50 years, R≥50: patients with reflux with 50 years or older.
