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A 47-year-old female with a history of hypertension presents to your outpatient clinic for numbness, tingling in her right hand that has been slowly worsening over the last several months. She has tried using a splint but receives minimal relief. She is an analyst for a large consulting firm and spends most of her workday in front of a computer. Upon examination, you noticed that the patient has a prominent jaw and her hands appear disproportionately large. Her temperature is 99 deg F (37.2 deg C), blood pressure is 154/72 mmHg, pulse is 87/min, respirations are 12/min. A fasting basic metabolic panel shows: Na: 138 mEq/L, K: 4.1 mEq/L, Cl: 103 mEq/L, CO2: 24 mEq/L, BUN: 12 mg/dL, Cr: 0.8 mg/dL, Glucose: 163 mg/dL. Which of the following tests would be most helpful in identifying the underlying diagnosis?
Measurement of serum morning cortisol levels and dexamethasone suppression test
Measurement of insulin-like growth factor 1 alone and growth hormone levels after oral glucose
Measurement of thyroid stimulating hormone
Measurement of serum growth hormone alone
Measurement of insulin-like growth factor 1 levels alone
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