Case Presentation A 16-year-old female with a history of delayed endocrinology follow-up presented with acute confusion, fever, tachycardia, agitation, and respiratory symptoms. History of Present Illness The patient developed flu-like symptoms with productive cough one day prior to admission Rapid progression to altered mental status prompted emergency medical services transfer to the hospital No history of substance use, allergies, or chronic comorbidities was reported Initial Clinical Examination Vital signs: blood pressure ~120/60 mmHg, heart rate 100–108 bpm, respiratory rate 26/min, SpO₂ 98% on room air Febrile and agitated on presentation Neurological examination revealed aphasia and altered consciousness with a Glasgow Coma Scale score of 11/15 Cardiovascular and respiratory examinations were unremarkable aside from tachycardia Abdomen was diffusely tender without guarding; no…