"A Paralyzing Snack": An Endocrine Cause of Paralysis

Area of Science:

• Endocrinology
• Neurology
• Internal Medicine

Background:

• Thyrotoxic Periodic Paralysis (TPP) is a rare neuromuscular complication of hyperthyroidism.
• It is characterized by episodic, life-threatening hypokalemia and muscle weakness.
• TPP is more prevalent in Asian populations but can occur in Western countries.

Purpose of the Study:

• To describe a case of TPP in a young Caucasian male presenting with severe hypokalemia and lower limb weakness.
• To highlight the diagnostic challenges and management of TPP.
• To emphasize the role of dietary factors in TPP recurrence.

Main Methods:

• Case report of a young Caucasian male presenting to the Emergency Department.
• Clinical evaluation, laboratory testing (serum potassium, thyroid function tests).
• Monitoring of patient response to potassium infusion and dietary modifications.

Main Results:

• The patient presented with severe hypokalemia (1.4 mmol/L) and thyrotoxicosis, diagnosed as TPP.
• Initial treatment with potassium infusion led to temporary improvement.
• Symptom recurrence was linked to excessive carbohydrate intake, underscoring dietary triggers.

Conclusions:

• TPP, though rare in Western populations, requires prompt recognition and management.
• Hyperthyroidism is the underlying cause, and controlling thyroid levels is crucial.
• Dietary management, particularly limiting carbohydrate intake, is essential for preventing TPP relapses.