Unusual cause of proteinuria and re-renal failure after kidney transplantation: de novo localized AL amyloidosis in renal allograft

Amyloidosis results from the deposition of amyloid proteins in organ and tissues. It can be systemic or localized. Localized primary amyloidosis in renal allograft is an extremely rare clinical condition. We describe here a 46-year-old man who developed proteinuria and re-renal failure 5 years after receiving deceased renal allograft and proved to be a case of isolated primary AL amyloidosis in renal allograft confirmed by clinical investigations and renal biopsy.