A Reversible Cause of Skin Hyperpigmentation and Postural Hypotension

Table 2

Summary of patient’s laboratory results.

Investigation	Patient value (pretreatment)	Reference range*
Hemoglobin	10.5 gm/mL	12–16 gm/dL
Hematocrit	30.4	43.3%–46.6%
MCV	121 fL	80–100 fL
Platelet	133×10^9/L	177–406 Th/cm
Total white count	4.9×10^9/L	3.2--10.6×10^9/L
Peripheral smear	Macrocytosis	—
Serum vitamin B12	55 pg/mL	200–950 pg/mL
Serum folate
Plasma morning cortisol mcg/mL	10.24
Post-ACTH plasma cortisol	41.11	Normal > 18

∗Reference values are affected by multiple variables, including patient population and laboratory method used.