Which investigation best confirms Cushing syndrome?
Answer and explanation
Correct answer: B. Overnight dexamethasone suppression test
- Step 1: The test that best confirms Cushing syndrome is: overnight dexamethasone suppression test.
Answer
Overnight dexamethasone suppression test.
Why not the others: 'Short Synacthen test': it screens for adrenal insufficiency. 'Thyroid function tests': they assess the thyroid. 'Fasting glucose alone': it detects diabetes but not hypercortisolism.
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