Which laboratory finding would likely be elevated in a patient with Cushing's syndrome?

In a patient with Cushing's syndrome, the laboratory finding that would likely be elevated is serum cortisol. Cushing's syndrome is characterized by excessive levels of cortisol in the blood, which can result from various causes such as an adrenal tumor, pituitary adenoma (Cushing's disease), or ectopic ACTH production.

Elevated cortisol levels lead to the various symptoms associated with Cushing's syndrome, including weight gain, hypertension, and glucose intolerance. The measurement of serum cortisol is essential in diagnosing Cushing's syndrome; typically, this is assessed through a 24-hour urine free cortisol test, late-night salivary cortisol test, or serum cortisol levels.

In summary, the elevation of serum cortisol is a key indicator of Cushing's syndrome, distinguishing it from other conditions that might affect adrenal function or hormone regulation.