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• W2088760876 abstract "Immunoglobulin free light chain (FLC) abnormalities are common in patients with monoclonal gammopathies and the kidneys are the most affected organs. Immunoassays that provide quantitative measurement of FLC in serum indicate monoclonal FLC production based on the presence of an abnormal FLC kappa:lambda (κ:λ) ratio. The aim of this study was to assess the utility of serum FLC measurement as a diagnostic tool for detecting plasma cell dyscrasias in comparison to standard assays, and to ascertain its sensitivity and specificity in patients with acute renal failure (ARF).Sera from 82 patients with ARF were assessed using serum protein electrophoresis (SPE), serum immunofixation electrophoresis (SIFE), and FLC measurement. The sensitivity and specificity of the FLC ratio in identifying which ARF patients had multiple myeloma (MM) was compared to those of SPE and SIFE.Among the 82 patients with ARF, 7 were diagnosed as MM using SPE, SIFE, and bone marrow biopsy techniques. In total, 8 patients did not have a FLC κ:λ ratio that was within the published reference range (0:26-1:65); the FLC κ:λ ratio based on FLC measurement had a specificity of 96% and sensitivity of 71%, and positive and negative predictive values of 62.9% and 97.3%, respectively, for the diagnosis of MM.The sensitivity and specificity of the FLC κ:λ ratio for diagnosing MM in patients that presented with ARF were lower than those of SPE and SIFE. To further delineate the utility of the FLC κ:λ ratio additional prospective, well-designed large-scale studies are needed.None declared.Amaç: Monoklonal gammopatili hastalarda immunglobulin hafif serbest zincir anormalliklerine sık rastlanır ve bu hastalarda böbrekler en sık etkilenen organlardan biridir. Serum immunglobulin hafif serbest zincir düzeylerinin sayısal ölçümünü sağlayan yöntemlerle, monoklonal immunglobulin hafif serbest zincir üretiminin varlığı anormal κ/λ oranlarına dayanmaktadır. Bu çalışmada akut böbrek yetmezliği ile başvuran hastalarda serum hafif serbest zincir analizinin plazma hücre diskrazilerinin saptanmasında tanısal değerinin standart yöntemlerle karşılaştırılarak, spesifite ve sensitivitesinin değerlendirilmesi amaçlanmıştır. Gereç ve Yöntemler: Akut böbrek yetmezliği ile başvuran 82 hasta serum protein elektroforezi, serum immunfiksasyon elektroforezi ve hafif serbest zincir ölçüm yöntemleriyle değerlendirildi. Akut böbrek yetmezlikli multipl myelom tanılı hastalarda hafif serbest zincir oranının sensitivite ve spesifitesi serum protein elektroforezi, serum immunfiksasyon elektroforez yöntemleriyle kıyaslandı. Bulgular: Akut böbrek yetmezliği ile başvuran 82 hastanın 7’sinde serum protein elektroforezi, immunfiksasyon elektroforezi ve kemik biopsisi ile multipl myelom tanısı kondu. Hastaların 8’inde κ/λ oranı yayınlarda bildirilen referans değerlerinin (0.26-1.65) dışında saptandı; serbest hafif zincir ölçümlerine dayanarak κ/λ oranı myelom tanısı için %96 spesifite,%71 sensitivite, %62.9 pozitif prediktif değer ve%97.3 negatif prediktif değere sahipti. Sonuç: Akut böbrek yetmezlikli multipl myelomlu hastalarda serum protein elektroforezi, serum immunfiksasyon elektroforez yöntemleriyle kıyaslandığında κ/λ hafif serbest zincir oranları düşük sensitivite ve spesifite değerine sahipti. Bu yöntem için daha doğru yorum yapabilmek için daha iyi dizayn edilmiş, prospektif ve çok sayıda hasta içeren çalışmalara ihtiyaç vardır." @default.
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• W2088760876 date "2012-01-01" @default.
• W2088760876 modified "2023-10-03" @default.
• W2088760876 title "The Value of Serum Immunoglobulin Free Light Chain Assessment in Patients with Monoclonal Gammopathies and Acute Renal Failure" @default.
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• W2088760876 doi "https://doi.org/10.5505/tjh.2012.48640" @default.
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