A Reversible Cause of Skin Hyperpigmentation and Postural Hypotension

Table 1

Summary of patient’s laboratory results.

Investigation	Pretreatment	Posttreatment	Reference range*
Hemoglobin (gm/dL)	10.9	10.8	12–16 gm/dL
Hematocrit %	31.6	31.1	43.3%–46.6%
Mean corpuscular volume: MCV (fL)	113	86.4	80–100 fL
Serum vitamin B12 (pg/mL)	67	412	200–950 pg/mL
Thyroid-stimulating hormone: TSH (milli-int units/L)	1.36		0.4–4.0 mIU/L
Free thyroxine (microgm/dL)	1.47		0.7–2.0 mcg/dL
Plasma morning cortisol (microgm/dL)	7.1
Post-adrenocorticotropic hormone (ACTH) plasma cortisol (microgm/dL)	27.3		Normal > 18

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