Which condition is characterized by primary hyperaldosteronism due to adrenal tumors or hyperplasia?

Primary hyperaldosteronism, also known as Conn's syndrome, is characterized by the overproduction of aldosterone from the adrenal glands, which can occur due to adrenal tumors or hyperplasia. In this condition, the excessive levels of aldosterone lead to imbalances in sodium and potassium, often resulting in hypertension and hypokalemia. This distinguishes Conn's syndrome from other conditions, as it is specifically tied to the adrenal production of aldosterone rather than cortisol or other adrenal hormones.

Cushing's syndrome, on the other hand, is characterized by an excess of cortisol, which can come from various sources, including adrenal tumors or pituitary adenomas, but does not primarily involve aldosterone production. Addison's disease is characterized by insufficient production of adrenal hormones, including aldosterone, due to adrenal gland damage or dysfunction. Pheochromocytoma involves the overproduction of catecholamines (like adrenaline) from adrenal tumors, but does not relate to aldosterone levels. Therefore, Conn's syndrome is the accurate label for the condition involving primary hyperaldosteronism due to adrenal tumors or hyperplasia.