54-year-old man with weight gain and muscle weakness

Results of appropriate testing return and show the following:

Blood:

Test (units)	Result (normal value)	Results (SI Units)
Glucose	306 mg/dL	17.0 mmol/L
Capillary Blood Ketones	Negative

Serum:

Test (units)	Result (normal value)	Results (SI Units)
Na+	138 mEq/L	138 mmol/L
K+	2.9 mEq/L	2.9 mmol/L
CI-	95 mEq/L	95 mmol/L
HCO3-	28 mEq/L	28 mmol/L
Creatinine	0.88 mg/dL	78 mcmol/L
Midnight serum cortisol	43.5 mcg/dL	1200 nmol/L
LFT	Normal
TSH	0.04 mIU/L	0.04 mIU/L
FT4	0.65 ng/dL	8.4 pmol/L