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[Light chain deposition disease]

E Terzani1, B Alterini, M Doni

  • 1Divisione di Medicina Interna IV, Policlinico di Careggi, Firenze.

Annali Italiani Di Medicina Interna : Organo Ufficiale Della Societa Italiana Di Medicina Interna
|April 1, 1994
PubMed
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This case study details a rare K-light chain deposition disease (LCDD) in a patient with hypertension and kidney disease. Treatment with melphalan and prednisone stabilized renal function, offering insights into managing this condition.

Area of Science:

  • Nephrology
  • Hematology
  • Pathology

Background:

  • Monoclonal immunoglobulin deposition diseases (MIDD) are rare disorders characterized by the deposition of immunoglobulin light or heavy chains in organs.
  • K-light chain deposition disease (LCDD) is a subtype of MIDD, often affecting the kidneys and leading to progressive nephropathy.

Observation:

  • A 61-year-old male with hypertension presented with rapidly progressing nephropathy.
  • Renal and liver biopsies confirmed LCDD with K-light chain deposits in the glomeruli and tubules.
  • Bone marrow examination showed lymphoid infiltration positive for K-light chain staining.

Findings:

  • The patient exhibited hepatic and urinary K-light chains but no circulating light chains.
  • Kidney biopsy revealed nodular glomerulosclerosis and extensive tubular involvement.

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  • No evidence of liver dysfunction or amyloidosis was found in the kidney, liver, or bone marrow.

    • Implications:

    • This case highlights a rare presentation of LCDD and its diagnostic confirmation through biopsy.
    • Therapy with melphalan and prednisone appeared to stabilize renal function over one year.
    • Understanding the physiopathology of light chain MIDD is crucial for effective patient management and treatment strategies.