Duodenal biopsy: an unexpected confirmatory test for a patient with al-amyloidosis

SSystemic AL- amyloidosis is a disorder of protein folding in which there is extra-cellular accumulation as β pleated fibrillar deposits of monoclonal immunoglobulin light chain fragments. AL- amyloidosis is a rare clinical entity. A presentation with clinical and histological evidence of gastrointestinal amyloidosis is even rare. Here we report primary AL- amyloidosis secondary to lamda (λ) light chain myeloma in a middle-aged woman who presented with nephrotic syndrome and motor peripheral neuropathy.