Which symptom is commonly found in both pheochromocytoma and Cushing's syndrome?

Diaphoresis, or excessive sweating, is a symptom commonly found in both pheochromocytoma and Cushing's syndrome due to their underlying pathophysiology related to hormonal imbalances.

In pheochromocytoma, a tumor typically located in the adrenal glands secretes catecholamines (such as epinephrine and norepinephrine), which can increase metabolic rate and stimulate sympathetic nervous system activation. This often results in symptoms such as increased heart rate, anxiety, elevated blood pressure, and diaphoresis.

On the other hand, Cushing's syndrome is characterized by excessive cortisol levels, which can also lead to increased sympathetic nervous system activity and can result in diaphoresis. In this condition, patients may experience other symptoms such as obesity, moon facies, and easy bruising, but sweating is a notable overlap with pheochromocytoma.

The other options do not share the same commonality. Weight loss is more associated with pheochromocytoma due to increased metabolism, while Cushing's syndrome often leads to weight gain. A deficiency in insulin is unrelated to either condition, as both typically involve disturbances in hormone production without an emphasis on insulin deficiency. Joint pain is not a common symptom of either condition; it