Central Diabetes Insipidus in Suprasellar Germ Cell Tumor Paradoxically Presenting With Oliguria

Central diabetes insipidus may present as oliguric acute kidney injury (AKI), particularly in patients with communication difficulties. While polyuria is common in AKI recovery, persistent or unexplained hypernatremia should prompt suspicion for alternative diagnoses such as unmasked diabetes insipidus to ensure timely recognition and appropriate management.