16 February 2021
: Case report 
An Unusual Case of Neurosyphilis Manifesting as Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH)
Unusual clinical course, Challenging differential diagnosis
Hannah L. Seay1BCDEF*, Loura Khallouf1BDEF, Alyson Lieberman1B, Sandeep S. Jubbal12BCDEGDOI: 10.12659/AJCR.929050
Am J Case Rep 2021; 22:e929050
Table 2. Trends in critical lab values throughout admission.
| Laboratory values | Day 1 | Day 2 | Day 3 | Day 4 | Day 5 | Day 6 | Day 7 | Reference range |
|---|---|---|---|---|---|---|---|---|
| Serum sodium (mmol/L) | 124 | 130 | 133 | 133 | 133 | 131 | 133 | 135–145 |
| Serum osmolality | 264 | 279–295 | ||||||
| Urine sodium (mmol/L) | 20 | 31 | ||||||
| Urine osmolality | 148 | 274 | 70–900 |