The Ailliance Post-Market Clinical Study

Inclusion Criteria: 1. Subject provides written informed consent per institution and/or geographical requirements. 2. Subject is intended to receive or be treated with an eligible Medtronic Cranial and Spinal Technology (CST) device(s) (see product appendices), used alone or in combination, for a cranial and/or spinal indication(s). 3. Subject is at least 18 years of age or minimum legal age as required by local regulations. 4. Subject agrees to complete all required assessments per the Schedule of Events. Exclusion Criteria: 1. Subject is currently enrolled or plans to enroll in concurrent drug/device/biologic trial(s) that may confound this trial's results per investigator assessment (i.e. no required intervention that could affect interpretation of all-around device safety and or performance). 2. Subject who is, or is expected to be, inaccessible for all required follow-up visits. 3. Subject with exclusion criteria required by local law. 4. Subject is considered vulnerable at the time of obtaining consent.