MRCP2-1474

MRCP2-1474

A 30-year-old woman presents with recent weight gain, particularly on her face and abdomen. She reports irregular periods and was diagnosed with type 2 diabetes mellitus last year. The patient admits to consuming 15 units of alcohol daily. During examination, violaceous striae are observed on her abdomen, and proximal muscle weakness is evident. Blood tests reveal a sodium level of 143 mmol/L (135 – 145) and a potassium level of 2.8 mmol/L (3.5 – 5.0). The medical team suspects that the patient’s alcohol use may be the cause of her symptoms and wants to differentiate it from an endogenous cause. What is the most appropriate investigation?