24 March 2021
: Case report 
Hyponatremia and Encephalopathy in a 55-Year-old Woman with Syndrome of Inappropriate Antidiuretic Hormone Secretion as an Isolated Presentation of SARS-CoV-2 Infection
Unknown etiology, Challenging differential diagnosis
Andleeb Sherazi1AEFG*, Puneet Bedi1ABCDEFG, Ehizode Udevbulu2AE, Vadim Rubin1ABCDEFG, Lutfi Alasadi1ABCDEFG, Samuel Spitalewitz1ABEFGDOI: 10.12659/AJCR.930135
Am J Case Rep 2021; 22:e930135
Table 1. Initial laboratory values in our patient.
| Serum sodium | 116 mEq/L | Normal range 135–145 mEq/L |
| Serum osmolarity | 251 mOsm/kg | Normal reference range 285–295 mOsm/kg |
| Urine osmolarity | 364 mOsm/kg | Normal range varies |
| Urine sodium | 69 mEq/L | Normal reference range 30.0–90.0 mEq/L |
| Thyroid-stimulating hormone | 1.1 mIU/L | Normal reference 0.465–4.680 mIU/L |
| Cortisol | 16.7 mcg/dL | Normal range 4.46–22.70 mcg/dL |
| Glucose | 324 mg/dL | Normal reference 70–90mg/dL |