apituitarism

Total lack of functional pituitary tissue; may be iatrogenic ( e.g., as a consequence of hypophysectomy) or the result of a spontaneous disease process.

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api·tu·i·tar·ism (a″pĭ-tooґĭ-tər-iz″əm) 1. lack of pituitary tissue; it may be congenital, as with anencephaly, or acquired, as by hypophysectomy. 2. hypopituitarism.