Hi @elainerb, I'd like to add my welcome. I can understand you are anxious. I can assure you that you are in good hands at Mayo Clinic.

For others reading this discussion, a posterior communicating (PCoA) artery that is bilobed with daughter sacs is a form of a cerebral aneurysm with a complex, fragile structure that increases the risk of rupture and subarachnoid hemorrhage.

The neurosurgery department is ranked among the Best Hospitals for neurology and neurosurgery in the U.S. News & World Report Best Hospitals rankings. In a few days, you will receive more information from Mayo Clinic in a package called the Patient Appointment Guide.

I'm tagging a few members like @bonnieh218 @purpleturtle @jenniferhunter @nancy82415 @jlharsh some of whom have been seen by neurosurgery specialists at Mayo Clinic.

Elaine, the Mayo Clinic patient portal is a useful communication tool before you go and while you're at Mayo Clinic. Have you downloaded the patient portal? Do you need help with that?