Severe Hyponatremia Presenting with Minimal Symptoms.

Area of Science:

• Nephrology
• Internal Medicine
• Clinical Case Study

Background:

• Hyponatremia, a common electrolyte imbalance, typically presents with symptoms correlating to sodium levels.
• Severe hyponatremia (serum sodium <100 mEq/L) is often associated with significant clinical manifestations.

Observation:

• An 86-year-old woman presented with serum sodium levels of 99 mEq/L and only reported difficulty walking.
• Despite profound hyponatremia, the patient remained asymptomatic regarding mental status and neurological function throughout hospitalization.

Findings:

• Diagnostic workup indicated thiazide-associated hyponatremia, a known complication of diuretic use.
• Discontinuation of the offending thiazide medication is the primary management strategy.

Implications:

• This case underscores that the severity of hyponatremia does not always correlate with the degree of clinical symptoms.
• Clinicians should consider thiazide-induced hyponatremia even in patients with minimal presenting complaints.