Introducción:

Diabetes insipidus as the first clinical manifestation of pituitary neoplasm metastasis Up to de 90 percent of the masses that are detected in the pituitary gland correspond to adenomas. On the contrary, pituitary metastasis only represent a 1 percent, which is a diagnostic challenge in the medical practice. Most of the time, these lesions are detected casually in autopsy; but it is important to consider that aproximatelly a 7 percent of these lesions can be clinically expresed as diabetes insipidus. Here we present a patient with initial symptoms of diabetes insipidus with the final diagnostic of lung adenocarcinoma