tolvaptancyclophosphamideAutoimmune small-vessel cerebral vasculitistype 1 diabetes mellitusautoimmune small-vessel vasculitisautoimmune small-vessel CNS vasculitishypothyroidismautoimmune small-vessel central nervous system (CNS) vasculitisSIADHhigh-dose corticosteroid therapy
… immunotherapy, consistent with refractory SIADH. Initiation of tolvaptan, a selective vasopressin V2-receptor antagonist, successfully r…