Abstract
A 67-year-old man was admitted on July 14th 1986 because of general malaise, a low fever, loss of weight and an abnormal shadow on the chest x-ray film. He was diagnosed as pulmonary tuberculosis associated with syndrome of inappropriate secretion of antidiuretic hormone (SIADH). Hyponatremia was relieved by administration of antituberculous agents and the restriction of water intake. There have been only a few reports about cases of pulmonary tuberculosis associated with SIADH. The pathogenesis and treatment of this disorder were also discussed.