Is the removal off the pituitary gland a dangerous surgical procedure?

Need more info: The removal of the pituitary through transphenoidal surgery is fairly straightforward, in the hands of good surgeons who do this routinely. But why is this being done? You will have to replace the lost hormones, typically thyroid and adrenal and sex steroids. If there is an isolated pituitary tumor, they should remove it and leave behind normal pituitary, if possible.