Acromegaly is caused by:

Acromegaly is a hormonal disorder characterized by the excessive production of growth hormone (GH) during adulthood. This condition is almost always caused by a benign tumor (adenoma) in the anterior pituitary gland. The anterior pituitary is responsible for synthesizing and secreting several crucial hormones, including growth hormone. When this gland overproduces GH after the growth plates have fused (i.e., in adulthood), it leads to the characteristic symptoms of acromegaly, such as the enlargement of bones in the hands, feet, and face, as well as various systemic complications affecting soft tissues and organs.

• The Thyroid gland produces thyroid hormones (T3 and T4) that regulate metabolism. Disorders of the thyroid gland include hyperthyroidism and hypothyroidism, but not acromegaly.
• The Adrenal gland produces hormones like cortisol, aldosterone, and adrenaline. Its disorders include Cushing's syndrome or Addison's disease, not acromegaly.
• The Thymus gland is primarily involved in the development of the immune system, particularly T-lymphocytes, and does not play a direct role in the production or regulation of growth hormone.