You have been asked to interpret the following TFT results Blood result Value Normal value TSH 3.0mU/L 0.40-4.0mU/L Free T4 13.0pmol/L 9.0-25.0pmol/L Free T3 5.9pmol/L 3.5-7.8pmol/L PTH 10.3pmol/L 1.6-6.9pmol/L Given the most likely diagnosis, what is the next most appropriate step in management of this condition?