| A rare cause of glomerulonephritis characterized by glomerular accumulation of non-amyloid fibrils in the mesangium and the glomerular (and rarely tubular) basement membrane, and mainly presenting with renal insufficiency, micro-hematuria and nephritic range proteinuria. Etiology is unknown. The disease is generally considered idiopathic but it may be associated with secondary causes such as monoclonal or oligoclonal gammopathy, hepatitis B and C infections, autoimmune diseases and malignancies. |
