Symptomatic Rathke Cyst Simulating Pituitary Adenoma

摘要

A case of presentation of Rathke cyst is reported, uncommon because of its precocity, with endocrinologic clinical manifestation of diabetes insipidus and preservation of anterior pituitary function. As there was no clinical suspicion or imaging evidence of this diagnosis, the female patient was submitted to transsphenoidal surgery for pituitary microadenomectomy. Pathologic examination diagnosed Rathke cyst. After the intervention, diabetes insipidus persisted. The possibility of Rathke cyst should be raised in the differential diagnosis of nonfunctioning pituitary adenomas.