It is important to go to a hospital with a Neuroendocrine Unit or Pituitary Testing Facility, preferably both. (This may necessitate plane travel, but it would be worth every penny.) Pituitary blood tests can be very complicated and must be performed by specially trained technicians who can conduct dynamic hormone testing and precisely-timed blood sampling, administer testing agents, and have special expertise in measuring pituitary hormones. Tests that require special attention include ACTH (Cortrosyn) stimulation, bilateral inferior petrosal sinus ACTH sampling, Insulin tolerance, growth hormone stimulation, TRH stimulation, GnRH stimulation, Oral glucose tolerance, and GHRH/arginine testing for growth hormone reserve.
