The Evolving Landscape of Anti-Clonal Therapy in Newly Diagnosed Systemic Light-Chain (AL) Amyloidosis: Evidence and Time-Based Comparative Glimpse with Multiple Myeloma

Systemic light-chain (AL) amyloidosis is a rare and incurable disease, classified under the category of plasma cell neoplasms and other diseases with paraproteins in the fifth edition of the World Health Organization classification of lymphoid tumors. This entity shares some similarities with multiple myeloma (MM), remarkably a bone marrow infiltration of clonal plasma cells. Moreover, one out of five newly diagnosed AL amyloidosis (NDAL) also fulfills the current diagnostic criteria for MM. A multidisciplinary therapy approach should be established, in which hematological therapy plays a crucial role. Anti-clonal therapy is the basis of hematological therapy, besides supportive therapy and emerging anti-fibrils therapy. In recent years, advances in the anti-clonal therapy of MM have progressively transferred to carefully selected patients with systemic AL amyloidosis, significantly improving outcomes in this rapidly changing field. This review aims to critically analyze the comparative evolution and evidence-based approach of anti-clonal therapy in NDAL vs. MM since the introduction of bortezomib. Participation in clinical trials remains the first option to consider in daily clinical practice.