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  • Title: [Randall-type monoclonal immunoglobulin deposition disease: From diagnosis to treatment].
    Author: Cohen C, Javaugue V, Joly F, Arnulf B, Fermand JP, Jaccard A, Sirac C, Knebelmann B, Bridoux F, Touchard G.
    Journal: Nephrol Ther; 2016 Jun; 12(3):131-9. PubMed ID: 27117766.
    Abstract:
    Monoclonal immunoglobulin (Ig) deposition disease (MIDD) is a rare complication of plasma cell disorders, defined by linear Congo red-negative deposits of monoclonal light chain (LCDD), heavy chain (HCDD) or both (LHCDD) along basement membranes. MIDD should be suspected in patients presenting with glomerular proteinuria and monoclonal gammopathy, but none of these criteria is necessary for the diagnosis although renal involvement is prominent. Since an abnormal serum κ/λ ratio is found in virtually all MIDD patients, including those with HCDD, serum free light chain assay should be included in the initial workup in patients older than 50 presenting with kidney disease. Bortezomib-based regimens are efficient and well tolerated, resulting in improvement in both renal and global survival, comparatively to historical series. High dose melphalan with autologous stem cell transplantation may be proposed as second line therapy in selected patients. The achievement of hematological response, based on the difference between involved and uninvolved serum free light chains (dFLC), is mandatory. In a recent series, post-treatment dFLC<40mg/L was the major predictive factor of renal response and was associated with improvement of both renal and global survival. In MIDD, bortezomib-based therapy is safe and efficient when introduced early after diagnosis. dFLC response is a favorable prognostic factor for renal survival.
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