In a patient suspected of having Addison's syndrome, which symptom would be expected?

In a patient suspected of having Addison's syndrome, hyperkalemia is an expected symptom due to the adrenal insufficiency associated with the condition. Addison's syndrome typically involves inadequate production of adrenal hormones, particularly cortisol and aldosterone. Aldosterone plays a critical role in regulating electrolyte balance, especially sodium and potassium levels in the body.

When aldosterone levels are low, as seen in Addison's syndrome, the kidneys are unable to excrete adequate amounts of potassium. This results in an accumulation of potassium in the bloodstream, leading to hyperkalemia. Additionally, the lack of aldosterone can cause a loss of sodium and water, which may contribute to a state of dehydration rather than increasing blood pressure, making hypertension less common in these patients.

Understanding these mechanisms is essential, as they explain why hyperkalemia is a classic finding in Addison's syndrome, indicative of the underlying adrenal dysfunction. This knowledge is crucial for diagnosing and managing disorders of the adrenal glands effectively.