Visceral involvement of dialysis amyloidosis.

Carpal tunnel syndrome, peripheral arthropathy, erosive spondyloarthropathy and lytic bone lesions have all been associated with dialysis amyloidosis. Recent studies indicate that beta 2-microglobulin is the major constituent protein in this new form of amyloidosis. Dialysis amyloidosis was reported to have a local rather than a systemic involvement, although its full extent is yet to be determined. We investigated 3 patients on maintenance hemodialysis with bilateral carpal tunnel syndrome and amyloid arthropathy and found amyloid depositions in several organs. These findings suggest that, in contrast to what had been thought previously, dialysis amyloidosis could have systemic as well as visceral distribution. The amyloid deposits found were resistant against potassium permanganate treatment and reacted with anti-human beta 2-microglobulin antibody.