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From the MRI I do see a pituitary microadenoma. Your endocrinologist will be the best guy who can suggest you whether to continue medical management or is there a need for surgery. Pituitary adenomas are non cancerous, ( 0.1-0.2 % incidence ), and they are also non-invasive, mostly not capable of causing a lot of substantial damage.
Risk of surgery for patients with Cushings is high with relatively low success rates...
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