Mild cognitive disorder as clinical manifestation of pituitary stalk neurosarcoidosis: case report.

A case is presented of a 59-year-old male patient with a 5-year history of sarcoidosis. In the last half a year, deterioration of his intellectual abilities was noticed. Psychological testing detected a mild cognitive disorder. Laboratory diagnostics found a decreased level of testosterone and magnetic resonance imaging showed pituitary stalk neurosarcoidosis without any other pathomorphological substrate of cognitive impairment. This case indicates that neurosarcoidosis should be considered as a possible cause of mild cognitive disorder and, consequently, included in the International Classification of Mental and Behavioural Disorders.