Hi
@mbebrown,
According to this article some glucose intolerance may persist.
EFFECTIVENESS OF CUSHING'S SYNDROME TREATMENT
If treatment removes the source of excess cortisol, most of the symptoms of Cushing's syndrome disappear within 2 to 12 months. Osteoporosis begins to improve within six months and continues to improve over several years. With successful treatment, children with Cushing's syndrome can regain much of their lost bone density and growth. Some high blood pressure and glucose intolerance may persist. Although symptoms of excess cortisol on the brain (emotional, sleep, memory disturbances) usually improve, some conditions can linger even after cortisol levels have been lowered.
http://www.uptodate.com/contents/cushings-syndrome-treatment-beyond-the-basics