Objective:To enhance the awareness of masked central diabetes insipidus by introducing three cases and reviewing literature. Methods:The common characteristics of these cases were analyzed,and literature from CNKI,VIP as well as Pub Med database was searched and 9 relative case reports were found out. Results:Our cases all presented with classic hypopituitarism symptoms and increased urine volume,serum sodium,serum chloride as well as serum osmotic pressure after cortisol replacement. They also presented wi...