Symptomatic hypotonic hyponatremia presenting at high altitude.

Area of Science:

• Clinical Medicine
• Neurology
• Altitude Medicine

Background:

• High altitude environments pose risks for various illnesses, including high altitude cerebral edema (HACE).
• Altered mental status and seizures are critical symptoms requiring prompt and accurate diagnosis.

Observation:

• A patient presented with altered mental status and seizure at high altitude, initially suspected to be HACE.
• Diagnostic imaging and laboratory data revealed symptomatic hypotonic hyponatremia as the underlying cause.

Findings:

• Symptomatic hypotonic hyponatremia can present with neurological symptoms mimicking high altitude cerebral edema.
• Accurate diagnosis requires comprehensive evaluation beyond presumptive altitude-related conditions.

Implications:

• Clinicians managing patients in alpine settings must consider a broad differential diagnosis for altered mental status.
• This case emphasizes the importance of laboratory investigations to differentiate between various causes of neurological compromise at altitude.