Excessive production of anterior pituitary hormones, especially growth hormone; may result in gigantism or acromegaly.
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hy·per·pi·tu·ita·rism -pə-'t(y)ü-ət-ə-.riz-əm, -'t(y)ü-ə-.triz- n excessive production of growth hormones by the pituitary gland
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hy·per·pi·tu·i·ta·rism (hi″pər-pĭ-tooґĭ-tə-riz″əm) a condition due to excessive secretion of pituitary hormones. Adenomas producing growth hormone can cause acromegaly and pituitary gigantism; those producing corticotropin can cause Cushing disease; and those producing prolactin can cause galactorrhea-amenorrhea syndrome.Medical dictionary. 2011.