An 81-year-old man presented with vomiting, dizziness, and appetite loss for two weeks. On admission, he displayed impaired consciousness (Glasgow Coma Scale score: 12) with no neurologically abnormal findings or abdominal tenderness. However, he exhibited dry tongue and decreased skin turgor.
His height was 158 cm, body weight 42.1 kg, and body mass index 16.7 kg/m 2 . Other findings Blood pressure: 138/78 mmHg Pulse and heartbeat: Irregular Body temperature: 35.8°C. Electrocardiography: Demonstrated atrial fibrillation No familial history of diabetes There was no history of falling or bruising
