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Liddle syndrome in a newborn infant
Farahnak K Assadi1, Robert E Kimura, Uma Subramanian
1Section of Nephrology, Rush Children's Hospital, Rush University Medical College, 1725 West Harrison Street, Suite 718, Chicago, IL 60612, USA. fassadi@rush.edu
Pediatric Nephrology (Berlin, Germany)
|August 20, 2002
Summary
This study reports the youngest infant diagnosed with Liddle syndrome, a rare genetic hypertension disorder. Early amiloride treatment proved effective, highlighting its importance in managing this condition.
Area of Science:
- Pediatric Nephrology
- Genetics
- Endocrinology
Background:
- Liddle syndrome is a rare autosomal dominant disorder characterized by early-onset hypertension.
- It results from mutations in genes encoding epithelial sodium channels, leading to constitutive activation and sodium retention.
Observation:
- A 10-week-old female infant presented with severe hypertension, metabolic alkalosis, and urinary chloride wasting.
- Extensive workup, including normal renal imaging and hormonal levels (epinephrine, norepinephrine, catecholamines, thyroxine, steroids), ruled out other causes.
- The patient showed resistance to multiple antihypertensive medications but responded well to amiloride.
Findings:
- Low serum aldosterone and peripheral plasma renin activity were noted.
- The diagnostic criteria for Liddle syndrome were met based on the clinical presentation, laboratory findings, and therapeutic response to amiloride.
- This case represents the youngest reported patient with Liddle syndrome.
Implications:
- This case underscores the importance of considering Liddle syndrome in infants with unexplained hypertension and metabolic alkalosis.
- Early diagnosis and treatment with amiloride are crucial for managing Liddle syndrome and preventing long-term complications.
- Further research into the genetic basis and long-term outcomes of Liddle syndrome in infants is warranted.