Skull Fractures

The aim of this clinical trial is to compare musculoskeletal ultrasound with the reference standard diagnostic test (cranial CT scan) in patients with minor head trauma associated with scalp hematoma and suspected skull fracture. The primary objective is to assess the diagnostic accuracy of point-of-care ultrasound in detecting skull fractures, in terms of sensitivity, specificity, positive and negative predictive values, and likelihood ratios, using cranial CT as the reference standard.

The goal of this observational study is to develop and validate a clinical tool to predict which adolescents aged 11 to less than 18 years of age with mild traumatic brain injury (mTBI) are at an increased risk for developing significant new or worsening mental health conditions. The main aims the study wish to answer are: * Does the adolescent have new or worsening depression or anxiety defined as a change from their previous medical history using self-reported questionnaires at either one or three months post-injury? * Does the adolescent have unmet mental health care needs, defined as not receiving any mental or behavior health care in patients with new or worsening anxiety or depression as defined by the self reported questionnaires? Participants will be enrolled after being diagnosed in the emergency department (ED) with an mTBI. During the ED visit, the child's parent/caregiver and the adolescent will complete several questionnaires related to mental health which include tools to measure anxiety and depression. Participants will be asked to complete these questionnaires again at 1 month and 3 months post enrollment.