Les localisations secondaires à l’hypophyse des tumeurs malignes primitives ne sont habituellement que de diagnostic autopsique. En effet, la survenue de métastase symptomatique est rare et difficile à distinguer cliniquement et radiologiquement d’un adénome hypophysaire. Nous rapportons l’observation d’une métastase hypophysaire révélatrice d’un carcinome pulmonaire à petites cellules survenue chez un homme de 40 ans.

Metastatic tumors of the pituitary gland are not commonly diagnosed during life in cancer patients. The occurrence of symptomatic lesions is also very unusual and difficult to differentiate clinically and radiologically from pituitary adenomas. We report a case of pituitary metastasis which was the prime manifestation of a small cell lung carcinoma in a 40-year-old man. This cancer was revealed by diabetes insipidus and a hypopituitarism.