Diabetes Insipidus, NeurogenicDiabetes InsipidusDeamino Arginine VasopressinAntidiuretic AgentsPolyuriaHypopituitarismPituitary DiseasesHypernatremiaHypothalamic NeoplasmsPituitary Gland, PosteriorHypothalamic DiseasesNeurophysinsDiabetes Mellitus, Type 1Diabetes MellitusThirstVasopressinsDiabetes Mellitus, Type 2Histiocytosis, Langerhans-CellSella TurcicaHyponatremiaArginine VasopressinDiuresisPituitary GlandDiabetes ComplicationsMagnetic Resonance ImagingDiabetes Mellitus, ExperimentalOsmolar ConcentrationDiabetes, GestationalBlood GlucoseHemoglobin A, GlycosylatedHypoglycemic AgentsInsulinRisk Factors