Severe hypothyroidism with decreased mental status and hypothermia precipitated by infection, cold exposure, or trauma describes which condition?

Severe hypothyroidism with decreased mental status and hypothermia precipitated by infection, cold exposure, or trauma describes which condition?

• A. Thyroid storm
• B. Myxedema coma
• C. Addisonian crisis
• D. Sepsis

Answer: (B)

This scenario reflects myxedema coma, a severe decompensation of hypothyroidism characterized by altered mental status and hypothermia that is often precipitated by infection, cold exposure, or trauma. In this crisis, the body's metabolic rate is extremely reduced, leading to confusion or coma, bradycardia, hypoventilation with possible CO2 retention, hypotension, hyponatremia, and sometimes non-pitting edema and dry skin. The triggering factors—infection, cold, or trauma—are common precipitants that push someone with long-standing, untreated hypothyroidism into this life-threatening state. Thyroid storm would present with thyrotoxic features: high fever, marked agitation or tremors, tachycardia, and hyperdynamic symptoms, which contrasts with the hypothermia and mental slowing seen here. Addisonian crisis centers on adrenal insufficiency, typically with severe hypotension, hyperkalemia, hyponatremia, dehydration, and abdominal symptoms, not the profound hypothyroid state. Sepsis describes a systemic infection response and can worsen mental status, but it does not define the specific hypothyroid crisis pattern of severe hypothyroidism with hypothermia and altered consciousness.

This scenario reflects myxedema coma, a severe decompensation of hypothyroidism characterized by altered mental status and hypothermia that is often precipitated by infection, cold exposure, or trauma. In this crisis, the body's metabolic rate is extremely reduced, leading to confusion or coma, bradycardia, hypoventilation with possible CO2 retention, hypotension, hyponatremia, and sometimes non-pitting edema and dry skin. The triggering factors—infection, cold, or trauma—are common precipitants that push someone with long-standing, untreated hypothyroidism into this life-threatening state.

Thyroid storm would present with thyrotoxic features: high fever, marked agitation or tremors, tachycardia, and hyperdynamic symptoms, which contrasts with the hypothermia and mental slowing seen here. Addisonian crisis centers on adrenal insufficiency, typically with severe hypotension, hyperkalemia, hyponatremia, dehydration, and abdominal symptoms, not the profound hypothyroid state. Sepsis describes a systemic infection response and can worsen mental status, but it does not define the specific hypothyroid crisis pattern of severe hypothyroidism with hypothermia and altered consciousness.