Stryker PEEK Customized Implant: A Prospective Post Market Follow Up to Evaluate Safety, Performance and Effectiveness

Inclusion Criteria 1. Subject is eligible for a PEEK customized implant as per routine clinical practice. 2. Subject is 12 years of age or older (Europe only). 3. Subject is 3.5 years of age or older (USA only). 4. Adult subjects able to give consent. 5. Subjects under the age of 18 will have a legal representative or parents (France - both parents must sign) to provide informed consent. 6. Subjects who are unable to give consent themselves but have a legally authorized representative that may consent on their behalf. Exclusion Criteria 1. Subject has an active systemic or local infection. 2. Subject has known allergy to plastic or polymers and/or known sensitivity to foreign bodies. 3. Comprised bone due to poor blood supply, disease, infection or prior implantation, which would not allow adequate support or fixation of the implant. 4. Mental or neuromuscular disorder which could create an unacceptable risk of implant instability or implant fixation failure, or complications in postoperative care. 5. Knowingly pregnant or nursing women. 6. Concomitant participation in other clinical trials related to cranioplasty. 7. Subject who has an expected survival rate of less than 2 years, in the opinion of the investigator who takes consent.