Final answer:
The most common cause of Cushing's syndrome is a pituitary tumor, which leads to excessive production of cortisol. Treatment options include surgery or medication to regulate cortisol levels.
Step-by-step explanation:
The most common cause of Cushing's syndrome is a pituitary tumor. This tumor causes excessive production of ACTH, a hormone that stimulates the production of cortisol, leading to the symptoms of Cushing's syndrome. Some of the symptoms include obesity, diabetes, high blood pressure, excessive body hair, osteoporosis, and depression.
Treatment for Cushing's syndrome depends on the cause and may involve surgery to remove the tumor or medications to suppress the activity of the adrenal glands.