APOA1 and amyloidosis: To establish the amyloidosis typing procedure, FFPE tissue specimens from 42 renal amyloidosis patients were collected, including 9 ALκ, 12 ALλ, 4 ALECT2, 3 of each of AHL (IgGλ) and AHL (IgAλ), 2 cases of each of AH (IgG), AA and gelsolin amyloidosis (AGel), and 1 case of each of AHL (IgGκ), AFib, ATTR, apolipoprotein A1 amyloidosis (AApoAI) and lysozyme amyloidosis (ALys)).