label: Arcuate vein intima/medial amyloidosis
label_lc: arcuate vein intima/medial amyloidosis
description: "Amorphous extracellular substance in the inner or middle layer of the arcuate veins of the kidney. Amyloidosis stains Congo-red positive with typically an apple green birerfingence on polarization microscopy, and 8-12 nm fibrils on electron microscopy."