pituitary gland tumorous lesion measurement pituitary gland hyperplastic lesion measurement 2013-06-11T20:04:01Z Any measurement of a localized pathological change, especially one that is circumscribed and well defined, in structure of the pituitary gland, due to injury or disease and characterized by an abnormal increase in the number of normal cells in normal arrangement in the gland resulting in an increase in the size of the tissue. The pituitary gland is the small, oval endocrine gland attached to the base of the vertebrate brain and consisting of an anterior and posterior lobe, the secretions of which control the other endocrine glands and influence growth, metabolism, and maturation. CMO:0001620 JSmith clinical_measurement_ontology pituitary gland hyperplasia measurement