Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term “acromegaly” refers to a hormonal disorder which affects the pituitary gland, leading to the production of too much growth hormone (GH) in the body. While gigantism is defined as growth hormone excess occurring during childhood, acromegaly, which comes from the Greek words for "extremities" and "great", involves a GH excess once a person reaches a mature age. Affecting more than 17 % population worldwide, acromegaly can be treated by surgical removal of the tumor, medical therapy and radiation therapy of the pituitary. Learn more about the disease and its potential causes by reading this book.