A chronic disease of adults marked by enlargement of the bones of the extremities,face,and jaw that is caused by overactivity of the pituitary gland.

• 肢端肥大症由于脑下垂体过于活跃而在成年人中引起的一种慢性疾病，常表现为四肢骨骼、脸和下巴的增大。