Brain contusion in minor cranial traumas.

Minor cranial traumas without surgical emergency account for about 4% of admissions to our Neurological Service. We consider here 226 consecutive cases. Investigations include: clinical examination, skull X-rays, CSF, EEG, CT, isotopic cisternography. The aim of this study is to define the clinical characteristics of patients with minor head trauma and the priority of instrumental investigations. Correlation between clinical and laboratory findings suggests that: X-ray examination is not predictive of CSF hemorrhage or brain contusion; the CSF is bloody in 1/3 of asymptomatic cases and in 1/6 of cases without fracture; the EEG shows indirect signs of brain contusion even in cases without CT evidence; small subdural hematomas are best diagnosed by CT scan.