Frequency of Glomerular Dysfunction in Children with Beta Thalassaemia Major
Journal Title: Sultan Qaboos University Medical Journal - Year 2014, Vol 14, Issue 1
Abstract
Objectives: Tis study investigated the frequency of glomerular dysfunction in children with beta thalassaemia major (β-TM) by using different markers and correlating them with serum ferritin and iron chelation therapy. Methods: Te study, carried out between August 2011 and May 2012, included 100 patients with β-TM, in two groups. Group Ia (n = 62) received chelation therapy (deferoxamine). Group Ib (n = 38) received followup care at the Pediatric Hematology Outpatient Clinic, Minia University Children’s Hospital, Egypt. Group II included 50 apparently healthy controls, age- and sex-matched to Group I. All patients underwent a thorough history-taking, clinical examination and laboratory investigations. Results: Compared to Group II, Groups Ia and Ib had signifcantly higher levels of cystatin C, serum creatinine and serum ferritin, and a higher albumin/ creatinine ratio in their urine, and a signifcantly lower estimated glomerular fltration rate (eGFR) and creatinine clearance (P <0.05). Moreover, Group Ιa had a signifcantly lower eGFR and creatinine clearance than Group Ib. Cystatin C had a highly signifcant strong negative correlation with eGFR and creatinine clearance and a signifcantly strong positive correlation with serum ferritin, and a higher sensitivity and specifcity than serum creatinine and creatinine clearance for small changes in GFR. Conclusion: β-TM patients had a high frequency of glomerular dysfunction—possibly attributable to chronic anaemia, iron overload or chelation therapy. Periodic renal assessment is mandatory to detect renal complications. Cystatin C is a promising marker to monitor glomerular dysfunction, having a higher sensitivity and specifcity than serum creatinine and creatinine clearance for small changes in GFR.
Authors and Affiliations
Basma A. Ali| Department of Pediatrics, University Children Hospital, Minia University, Minia, Egypt, Ahmed M. Mahmoud| Department of Pediatrics, University Children Hospital, Minia University, Minia, Egypt
Keywords
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