BOF: 45
A 56-year-old male presents with a history of feeling
tired and weak. On examination he is obese and has marked pigmentation of his
skin. Blood pressure 190/110. he also has demonstrable weakness of his
proximal muscles .
Investigations reveal
Urea 5 mmol/L
Sodium 140 mmol/L
Potassium 2.7 mmol/L
Bicarbonate 32 mmol/L
Glucose 12 mmol /L
In this patient which one of the following would you
arrange as the initial investigation?
a)
Adrenal MRI
b)
24 hour urinary free cortisol
c)
High dose dexamethasone suppression test
d)
Plasma ACTH levels
e)
CRH test