MRCP2-1396
A 26-year-old female presents to the clinic with a worsening of fatigue that she has been experiencing for several months. She reports constipation, cold intolerance, and dry skin. She has no significant medical history and is not taking any regular medications. During examination, her lying blood pressure is 110/75 mmHg, which drops to 95/60 mmHg upon standing.
The following are the results of her investigations:
– Hemoglobin (Hb): 110 g/l
– Sodium (Na+): 131 mmol/l
– Fasting glucose: 7.5 mmol/l
– Platelets: 425 * 109/l
– Potassium (K+): 5.1 mmol/l
– Bicarbonate: 19 mmol/l
– White blood cells (WBC): 10.1 * 109/l
– Urea: 10.5 mmol/l
– Creatinine: 110 µmol/l
What is the most likely diagnosis?