Renal
diseases with organized deposits include
amyloid, fibrillary, immunotactoid, and cryoglobulinemic glomerulopathies.
AL amyloidosis and fibrillary
glomerulonephritis are different in the composition of their
immunoglobulin deposits. Fibrils of fibrillary
glomerulonephritis are usually composed of polyclonal, occasionally oligoclonal or monoclonal, immunoglobin G, but
amyloidosis consists of monoclonal
light chains. Simultaneous occurrence of fibrillary
glomerulonephritis and
AL amyloidosis is very rare. We
report a case of fibrillary
glomerulonephritis combined with
AL amyloidosis in a 71-yr-old man.