Final answer:
Acne, hirsutism, and easy bruising are symptoms of Cushing's syndrome, caused by excessive cortisol production, often due to a pituitary tumor.
Step-by-step explanation:
The manifestations of acne, hirsutism (excessive hairiness), and easy bruising are characteristic symptoms of a disease known as Cushing's syndrome. Cushing's syndrome is caused by an overproduction of the hormone cortisol, which can stem from a variety of causes including a pituitary tumor leading to excessive release of ACTH. Alongside the mentioned symptoms, Cushing's syndrome can also lead to weight gain, moon face, obesity, diabetes, high blood pressure, osteoporosis, and depression.