label: Renal arteriole intima/media amyloidosis
label_lc: renal arteriole intima/media amyloidosis
description: "Amorphous extracellular substance in the inner or middle layer of renal arterioles. Amyloidosis stains Congo-red positive with typically an apple green birerfingence on polarization microscopy, and 8-12 nm fibrils on electron microscopy."