MRCP-0405
A 30-year-old woman presents with amenorrhoea and galactorrhoea. She has normal visual fields. You are concerned that she may have a prolactinoma. Investigations were done and the results are as shown below: Hb 12.5 g/dL, WCC 4.9 x109/L, PLT 199 x109/L, Na+ 140 mmol/L, K+ 4.9 mmol/L, Creatinine 90 ىmol/L, Prolactin 1150 mU/l. MRI shows a 7 mm pituitary microadenoma. Which of the following hormones would you expect to be lower than normal?