A young man presents with history of motorcycle accident resulting in a fall on the head. The only finding is a bruise over the eyebrow. What is he most likely to suffer from?
**Core Concept**
The patient's symptoms are likely due to a concussion, which is a type of traumatic brain injury (TBI) caused by a blow to the head or body, a fall, or another injury that jars or shakes the brain inside the skull. This can lead to temporary changes in brain function, including memory loss, confusion, and altered mental status.
**Why the Correct Answer is Right**
The patient's symptoms are most likely due to a concussion because of the mechanism of injury (fall on the head) and the absence of more severe symptoms or focal neurological deficits. The bruise over the eyebrow may be a sign of a scalp hematoma, but it does not necessarily indicate a more severe head injury. Concussions are often caused by acceleration-deceleration forces that can occur during a fall or a blow to the head, leading to a shearing injury of the brain.
**Why Each Wrong Option is Incorrect**
* **Option A:** Cerebral edema is a potential complication of severe head injuries, but it is not directly related to the patient's symptoms in this case. Cerebral edema would typically require more severe symptoms, such as altered mental status, vomiting, and pupillary changes.
* **Option B:** Skull fracture is a possible complication of head injuries, but it is not the most likely diagnosis given the patient's symptoms. A skull fracture would typically require more severe symptoms, such as palpable crepitus, deformity, or neurological deficits.
* **Option D:** Epidural hematoma is a potential complication of head injuries, but it is not the most likely diagnosis given the patient's symptoms. An epidural hematoma would typically require more severe symptoms, such as altered mental status, vomiting, and pupillary changes.
**Clinical Pearl / High-Yield Fact**
Concussions are often referred to as "mild" TBI, but they can still have significant consequences, including cognitive impairment, mood changes, and increased risk of subsequent head injuries. It is essential to take a careful history and perform a thorough physical examination to rule out more severe head injuries.
**Correct Answer:** C.