许多恶性肿瘤如肺癌、胸腺癌、胰腺癌等均可合成、储存、释放抗利尿激素（ADH），尤其以肺癌（主要为燕麦细胞癌）为常见。肺癌引起的抗利尿激素分泌失调综合征（SIADH），有关资料和杂志已多次报道，但肺癌垂体后叶转移引起继发性尿崩症临床少见，现报告如下。患者男性，61岁 Many malignant tumors, such as lung cancer, thymic cancer, and pancreatic cancer, can synthesize, store, and release antidiuretic hormone (ADH), and lung cancer (mainly oat cell cancer) is common. The antidiuretic hormone imbalance syndrome (SIADH) caused by lung cancer has been repeatedly reported in related materials and magazines. However, the clinical diagnosis of secondary diabetes insipidus caused by metastasis to the posterior pituitary of lung cancer is rare. The report is as follows. Patient male, 61 years old