Bartter syndrome (BS) I–IV is a rare autosomal recessive disorder affecting salt reabsorption in the thick ascending limb of the loop of Henle. This report highlights clinicopathological findings and genetic studies of classic BS in a 22-year-old female patient who presented with persistent mild proteinuria for 2 years. A renal biopsy demonstrated a mild to moderate increase in the mesangial cells and matrix of most glomeruli, along with marked juxtaglomerular cell hyperplasia. These findings suggested BS associated with mild IgA nephropathy. Focal tubular atrophy, interstitial fibrosis, and lymphocytic infiltration were also observed. A genetic study of the patient and her parents revealed a mutation of the CLCNKB genes. The patient was diagnosed with BS, type III. This case represents an atypical presentation of classic BS in an adult patient. Pathologic findings of renal biopsy combined with genetic analysis and clinicolaboratory findings are important in making an accurate diagnosis.
Citations
Citations to this article as recorded by
Bartter syndrome with multiple renal and liver cysts: a case report Yemei He, Yue Zhou, Weihua Wu, Yue Chen, Santao Ou International Urology and Nephrology.2022; 55(1): 225. CrossRef
Bartter’s syndrome: clinical findings, genetic causes and therapeutic approach Flavia Cristina Carvalho Mrad, Sílvia Bouissou Morais Soares, Luiz Alberto Wanderley de Menezes Silva, Pedro Versiani dos Anjos Menezes, Ana Cristina Simões-e-Silva World Journal of Pediatrics.2021; 17(1): 31. CrossRef
Association of Adult-Onset Bartter Syndrome With Undifferentiated Connective Tissue Disorder Nida Saleem, Humaira Nasir, Danyal Hassan, Momena Manzoor Cureus.2021;[Epub] CrossRef
Acquired autoimmune Bartter syndrome in a patient with primary hypothyroidism Noreen Nasir, Deepali Mohanty, Arun Kumar Pande, Dhanita Khanna, Kavita Vishvakarma, Latika Gupta Rheumatology International.2021; 43(3): 567. CrossRef
A novel mutation associated with Type�III Bartter syndrome: A report of five cases Yanhan Li, Chengcheng Wu, Jie Gu, Dong Li, Yanling Yang Molecular Medicine Reports.2019;[Epub] CrossRef
Pathophysiology of antenatal Bartterʼs syndrome Martin Kömhoff, Kamel Laghmani Current Opinion in Nephrology and Hypertension.2017; 26(5): 419. CrossRef