Conclusion:Pituitary abscess should be considered when patients presented diabetes insipidus,hypopituitarism,sella bone erosion and sella neoplasm similar to a cyst tumor in CT or MRI.

• 结论：若鞍区病变不大，但引起较严重的蝶鞍骨质破坏，表现为尿崩症和垂体功能低下时，应首先考虑垂体脓肿。