Pituitary Tumor Surveillance: Pathogenic Correlation

This study monitors patients with pituitary tumors (abnormal growths on the small hormone-producing gland at the base of the brain) over time to understand which tumors grow, which stay stable, and what biological factors predict their behavior. **You may be eligible if...** - You have been diagnosed with a pituitary adenoma (a usually non-cancerous tumor of the pituitary gland) - You are under active surveillance or treatment for a pituitary tumor - You are willing to provide blood samples and undergo regular MRI scans **You may NOT be eligible if...** - Your pituitary tumor has been fully removed and you are no longer being monitored - You have a metal implant or other contraindication to MRI scanning - You are unable or unwilling to provide informed consent Talk to your doctor to see if this trial is right for you.