A recent case report published in Cureus highlights a rare presentation of Guillain-Barré syndrome (GBS), where the initial symptom was syndrome of inappropriate antidiuretic hormone secretion (SIADH). The report details a patient who developed hyponatremia due to SIADH before typical GBS symptoms such as muscle weakness or areflexia appeared.
Guillain-Barré syndrome is an autoimmune disorder that attacks the peripheral nervous system, often triggered by an infection. SIADH, a condition causing water retention and low sodium levels, is a known but uncommon complication of GBS, usually occurring after neurological symptoms. This case underscores the importance of considering GBS in patients with unexplained hyponatremia, especially if they have recent infection history.
The patient in the report was treated with intravenous immunoglobulin, a standard therapy for GBS, and showed gradual improvement. The authors emphasize that early recognition of SIADH as a potential harbinger of GBS can lead to timely diagnosis and management, potentially improving outcomes.
