非垂体肿瘤如鼻咽癌(NPC)作头颅照射后发生垂体机能减退的报道已日见增多。虽然低钠血可见于垂体机能减退,但后者的病因一般为 Shee-han 氏综合征,垂体肿瘤及空蝶鞍综合征。严重低 Non-pituitary tumors such as nasopharyngeal carcinoma (NPC) have been reported as a consequence of pituitary dysfunction after head irradiation. Although hyponatremia is found in hypopituitarism, the causes of the latter are generally Shee-han’s syndrome, pituitary tumors and empty sella syndrome. Seriously low