Final answer:
Acromegaly is caused by the post-puberty hypersecretion of growth hormone, leading to bone growth in the face, hands, and feet.
Step-by-step explanation:
Post-puberty hypersecretion of growth hormone from the anterior pituitary gland causes acromegaly. Acromegaly is a condition characterized by the overproduction of growth hormone (GH) in adults, leading to the growth of bones in the face, hands, and feet. Unlike gigantism, which occurs in childhood and results in an abnormally tall stature, acromegaly affects individuals who have stopped growing, causing an enlargement of bone structures that are still capable of growth.