Is adrenal insufficiency after pituitary tumor removal permanent? how long before most usually gain pituitary function for acth back?

Sometimes: It is really quite variable when the pituitary function restarts after the operation. It often depends on how much was removed. Unfortunately, sometimes it is permanent. Check with your neurosurgeon for more details.

It can be: Adrenal insufficiency after pituitary tumor removal can be permanent. It often depends on the size of the tumor and whether the hormonal axis was affected to start with. This can be followed with tests of adrenal function over time such as the acth stimulation test. If this improves over time, that is a sign that function is returning. These specials tests are administered by endocrinologists.