<s>[INST] A 3-month-old infant weighing 6 kg is brought to the emergency department with a fever of 39°C. The child is irritable and has a history of coughing and difficulty breathing. The emergency physician suspects pneumonia and orders a chest radiograph.
A.    A 32-year-old woman is a passenger in a car that is involved in a head-on collision at high speed. She wears a lap and shoulder harness, but the airbag does not deploy. She is transported to the emergency department, where she is found to have a cervical spine injury and a closed head injury. She is intubated for airway protection and is taken for a CT scan of the head and neck. The radiologist reports the presence of soft tissue swelling in the anterior neck, and a chest radiograph is ordered to evaluate for possible lung injury. Which of the following is the most likely chest radiograph finding in this patient?[/INST]