[Light chain deposition disease. Experience in our environment]

Area of Science:

• Nephrology
• Hematology
• Pathology

Context:

• Light chain deposition disease (LCDD) is a kidney disorder characterized by the deposition of immunoglobulin light chains in renal tubules.
• LCDD can be associated with plasma cell dyscrasias like multiple myeloma or occur idiopathically.
• The clinical presentation often involves renal insufficiency and nephrotic proteinuria, with a severe prognosis and limited treatment options.

Purpose:

• To analyze the characteristics of diagnosed LCDD cases within a specific healthcare environment.
• To investigate the association between LCDD and multiple myeloma.
• To evaluate the clinical presentation, pathological findings, and prognosis of LCDD patients.

Summary:

• Six cases of LCDD were identified between 1999-2005, with 50% associated with multiple myeloma.
• Common presentations included acute renal failure and nephrotic proteinuria, with biopsies showing thickened tubular basement membranes and kappa light chain deposition.
• Half of the patients required dialysis, and mortality was high, particularly in those with myeloma.

Impact:

• Suggests LCDD may be more prevalent than previously reported.
• Reinforces the association between LCDD and multiple myeloma.
• Underscores the poor renal and patient prognosis associated with LCDD.