The purpose of this clinical study is to gather post-market clinical evidence on the use of the Biodesign® Dural and Duraplasty Grafts when used as a dura substitute of the dura mater.

Inclusion Criteria:

1. Planned use of the Biodesign Dural or Duraplasty Graft.

Exclusion Criteria:

1. Age <18 years
2. Unable or unwilling to provide informed consent
3. Life expectancy <6 months

Patients who have had dura mater repair using a Biodesign Dural or Duraplasty Graft.

Cook Research Incorporated (CRI) is fully committed to supporting the principles of responsible data sharing, including providing qualified scientific researchers access to deidentified, patient-level data from CRI clinical studies to conduct legitimate scientific research. Data underlying the results reported in this clinical study will be made available for request after final report has been distributed and ending 5 years after final report has been distributed. Interested researchers may review the "Cook Research Incorporated Policy on Access to Clinical Study Data" at https://www.cookresearchinc.com/extranet/data-access.html and submit a complete research proposal to request data access. Additional study documents (such as the study protocol) will be shared as needed if the data access request is granted. A data sharing agreement will be executed for access to deidentified patient-level data.