MRCP2-1370

A 63-year-old woman presents with persistent hypertension and obesity, along with complaints of excessive pigmentation and headaches. In the 1970s, she underwent investigation for obesity, mild diabetes mellitus, and hypertension, which led to a bilateral adrenalectomy – the treatment of choice at the time. Since then, she has been on hydrocortisone and fludrocortisone treatment. On examination, she displays hyperpigmentation and striae, with a blood pressure reading of 175/100 mmHg. Visual fields appear normal. What is the probable diagnosis in this case?