Final answer:
The typical symptom of Conn's syndrome, often the only one seen in asymptomatic patients, is hypertension. Conn's syndrome leads to an overproduction of aldosterone and an imbalance of bodily salts and fluids, resulting in high blood pressure.
Step-by-step explanation:
The only symptom commonly shown in patients with Conn's syndrome, which can be otherwise asymptomatic, is a. Hypertension. Conn's syndrome, or primary hyperaldosteronism, is characterized by the overproduction of the hormone aldosterone by the adrenal glands, leading to an imbalance of salt and water in the body. This imbalance typically presents as high blood pressure, which can be resistant to standard treatments. Other symptoms such as fatigue, headache, and muscle weakness can occur but are not as consistent as hypertension.