All of the following conditions cause SIADH, except
Lung abcess, thymoma and pancreatic cancer are all associated with SIADH. SIADH is a state of pathologic hormone excess in the presence of hyponatremia and hypo osmolality. Laboratory features of SIADH includes reduced plasma osmolality, persistent urinary secretion of sodium (20mEq/L), and inappropriately high urine osmolality.
Lung abscess
Thymoma
Ca pancreas
Interstitial nephritis