A 60-year-old man suffered from 6 months of severe headaches andexcessive perspiration, he also became aware that he had developedtunnel vision. He had a 12-yr history of hypertension and vagueaches and pains in his shoulder and hand joints that were diagnosedas osteoarthrosis. On examination by his GP, he was found to havecourse facial features, a prominent jaw. He had bitemporalhemianopia, BP 145/105 mmHG and a slight glycosuria. He was sentfor a lateral skull x-ray that showed an enlarged pituitary fossa.Blood tests showed: Fasting glucose 9.2 (Reference range 3.5-6.5mmol/l) Luteinizing hormone 3.7 (Reference range 0.7-6.0 U/l)Follicle stimulating hormone 4.8 (Reference range <6 U/l)Prolactin 295 (Reference range <425 mU/l) Testosterone 18.1(Reference range10-35 nmol/l) Growth hormone 8.0 (Reference range<10 mU/l) Cortisol (random) 458 (Reference range 250-700 nmol/l)TSH 3.2 (Reference range 0.3-6.0 mU/l) Free T4 15.6 (Referencerange 9.4-25.0 pmol/l) What further biochemical tests would youperform?
