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Although primary systemic amyloid light-chain amyloidosis was considered intractable, recent advances in therapy have been reported to result in better clinical outcomes including remission of nephrotic syndrome. However, changes in renal pathologic findings after high-dose chemo- therapy have not been characterized. We describe a patient who underwent serial renal biopsies and had complete remission after high-dose melphalan and autologous stem cell transplantation for this form of amyloidosis. Successive renal biopsy specimens showed reduction in amyloid staining mainly in interlobular arterial and arteriolar walls. Thus, amyloid light-chain amyloidosis resolved both clinically and pathologically after high-dose chemotherapy.

Pathologic improvement after high-dose melphalan and autologous stem cell transplantation for primary systemic amyloidosis