Neurosurgical Outcomes Project (NEUROPRO) Purpose of the study This project is designed to collect and store health care information on a large number of patients treated by URMC Department of Neurosurgery faculty members. This information will be used in future research studies that analyze certain parts of the data. The main purpose of this is to determine what treatments are the best for a particular disease. The project will also permit URMC Department of Neurosurgery to develop programs with other doctors and will enable us to inform the public about advances in treatment. This project does not involve specific treatments and is not considered an experimental study.