Using Polyglycolic Acid Mesh Prevents Cerebrospinal Fluid Leakage

This study is testing whether a special mesh material (polyglycolic acid) can prevent spinal fluid leaks after surgery through the nose to remove a pituitary tumor — a small gland at the base of the brain. Researchers want to know if placing this mesh during surgery helps seal the area and reduce complications. **You may be eligible if...** - You have a pituitary gland tumor (either a first-time diagnosis or a returning tumor) - You are scheduled for endoscopic nasal surgery (surgery through the nose) to remove it **You may NOT be eligible if...** - Your pituitary tumor is not being treated with surgery - You have another type of brain tumor (not pituitary) - You are allergic to polyglycolic acid - You have previously had radiation therapy or chemotherapy Talk to your doctor to see if this trial is right for you.