Patients who sustained head injury

Head injury

Head injury refers to trauma of the head. This may or may not include injury to the brain. However, the terms traumatic brain injury and head injury are often used interchangeably in medical literature....

 of different degree may have leukocytosis

Leukocytosis

Leukocytosis is a raised white blood cell count above the normal range in the blood. It is frequently a sign of an inflammatory response, most commonly the result of infection, and is observed in certain parasitic infections...

 which is predictive of the severity of injury. Several researchers demonstrated that degree of leukocytosis correlates with severity of head trauma, and WBC of 22 correlates with severe head injury, 17- moderate and 12- mild. Glasgow Outcome Scale also correlates with leukocytosis on admission.