31-year-old woman with nausea and increased thirst

Laboratory Results

Results of appropriate testing return and show the following:

Blood:

Test (units) Result Results (SI Units)
Glucose, random 112 mg/dL 6.2 mmol/L

Serum:

Test (units) Result Results (SI Units)
Calcium, total 13.6 mg/dL 3.4 mmol/L
Na+ 136 mEq/L 136 mmol/L
K+ 4.9 mEq/L 4.9 mmol/L
Cl- 95 mEq/L 95 mmol/L
HCO3- 22 mEq/L 22 mmol/L
Creatinine 0.8 mg/dL 74 micromol/L
TSH 0.45 mU/L Normal 0.35-5.5 mU/L
FT4 1.2 ng/dL [14 pmol/L] Normal 0.9-1.7 ng/dL [10.5-20 pmol/L]
Phosphate 1.9 mg/dL [0.6 mmol/L] Normal 2.5-4.3 mg/dL [0.8-1.4 mmol/L]
Osmolality 285 mOsmol/kg Normal 280-295 mOsmol/kg

Urine

Test (units) Result Results (SI Units)
Osmolality 210 mOsmol/kg 50-1200 mOsmol/kg