This is a retrospective registry dataset of all adults who presented with cervical and/or skull base fractures or a subdural hematoma at Methodist Dallas Medical Center (MDMC) and had consults to the neurological surgery department beginning in January of 2016, and continuing until a statistically significant number of cases are obtained.

This is a retrospective registry dataset of all adults who presented with cervical and/or skull base fractures or a subdural hematoma at Methodist Dallas Medical Center (MDMC) and had consults to the neurological surgery department beginning in January of 2016, and continuing until a statistically significant number of cases are obtained. Subjects will undergo no additional tests or procedures as part of this registry study. All patient data will be obtained from the patient's electronic health records of the hospital or clinic in a retrospective manner. The process for gathering the data will not influence treatment decisions. There will be no direct patient contact associated with inclusion in this registry study.

Inclusion Criteria:

• Patients 18 years of age or older
• Presenting to MDMC with cervical and/or skull base fractures or those with subdural hematomas

Exclusion Criteria:

• Do not meet the Study Inclusion Criteria laid out in section 4.1.
• Vulnerable populations

• Patients 18 years of age or older
• Presenting to MDMC with cervical and/or skull base fractures or those with subdural hematomas