An extraaxially localized intrasellar giant hydatid cyst with hypophyseal insufficiency.

Hydatid cysts are rarely located in the central nervous system. Treatment involves surgical and medical interventions. In this article, we present the first published case of a giant hydatid cyst with an extraaxial intrasellar location. This is the first such case to be reported in the literature. The cyst caused somnolence, general affective disorder, panhypopituitarism, and progressive loss of vision.