A pituitary tumor can cause growth problems if the tumor is an adenoma that secretes growth hormone, according to the American Cancer Society. A child with one of these tumors is unusually tall and grows very quickly. He may also suffer from joint pain and hyperhydrosis.
However, if an adult contracts a pituitary tumor that secretes hormones, she does not grow any taller but suffers from a condition called acromegaly. Her voice deepens, and her skull, hands and feet grow. Her facial features change because of the growth of facial bones. She experiences joint pain and is subject to comorbidities, such as diabetes, heart disease and kidney stones.