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Updated: Jul 7, 2026
Ultrasonographic Evaluation of Salivary Glands for Sjogren's Syndrome: Diagnostic and Monitoring Insights
Published on: October 13, 2023
A case analysis of Gitelman syndrome complicated with Sjögren's disease
Yuqi Tang1, Sen Tian1, Cong Xia1
1The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China.
Background:
Sjögren's disease (an autoimmune exocrinopathy) and Gitelman syndrome (an autosomal recessive renal tubulopathy caused by SLC12A3 mutations) both manifest with hypokalemia. Their coexistence can significantly complicate differential diagnosis.
Methods:
A 62-years-old female presented with fatigue, dry mouth, and refractory hypokalemia. Immunological testing (positive antinuclear and anti-centromere protein B antibodies) and a labial gland biopsy confirmed Sjögren's disease. However, her severe hypokalemia was disproportionate to Sjögren's-induced renal tubular acidosis alone. Genetic analysis revealed compound heterozygous pathogenic mutations in SLC12A3: c.1196G > A (p.Arg399His) and c.1732G > A (p.Val578Met), confirming concurrent Gitelman syndrome.
Results:
Combined therapy with potassium supplementation and hydroxychloroquine successfully resolved symptoms and stabilized serum potassium levels.
Conclusion:
In Sjögren's disease patients with refractory hypokalemia, underlying hereditary renal tubular disorders should be suspected. Combining immunological evaluation with genetic testing is crucial to ensure accurate diagnosis and optimize management.
