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Rev Med Chil. 2013 Mar;141(3):396-401. doi: 10.4067/S0034-98872013000300018.

[Kidney involvement in Idiopathic Light Chain disease. Report of one case].

[Article in Spanish]

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Servicios de Nefrología, Hospital Británico de Buenos Aires, Argentina.


Idiopathic Light Chain disease (ILCD) is a systemic disease characterized by a deposit in different organs of light chain monoclonal immunoglobulins, produced by an abnormal clone of B cells. It is usually found in the course ofa plasma cell dyscrasia and in other lymphoproliferative alterations; however it may occur in absence of any hematologic disease and is denominated as idiopathic. We report a 51-year-old mole admitted to the hospital due to anasarca. Laboratory evaluation showed a serum creatinine of 1.4 mg/dl, a serum albumin of1.6 g/dl, a serum cholesterol of 687 mg/dl and a proteinuria of 5.3 g/day Light chains with a predominance of a monoclonal component were identified in urinary proteins by electrophoresis and kappa chains were identified by immunofixation. A renal biopsy showed a diffuse nodular glomerulopathy with a 35% tubular atrophy and interstitial sclerosis. Electrón microscopy confirmed light chain deposition. The bone marrow biopsy showed a myeloid hyperplasia. The patient was initially treated with methylprednisolone and plasmapheresis with a reduction in serum creatinine and disappearance of urinary kappa component. Albuminuria persisted and a malnutrition-inflammatory complex syndrome was diagnosed. Hemodialysis with ultrafiltration was started along with cyclophosphamide. The patient received hemodialysis for six months and continued with methylprednisolone.

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