Acute interhemispheric subdural hematomas. Report of nine cases

Nine male patients with acute interhemispheric subdural hematoma (ISH) are presented. The etiologic factor was trauma for all patients (traffic accident and falling down). The young adult cases and one child had bad prognosis due to severe clinical findings and high mortality. The asymptomatic patients were treated conservatively. In this report, we discussed etiologic factors, presentation of age groups, whether an ISH progresses to a chronic convexity subdural hematoma (SH), and real mortality rates for ISH with relevant literature knowledge. As a result, ISHs can present in all age groups including shaken babies, severely injured young adults as well as low velocity trauma striken elderly patients (especially those under anticoagulant medication). We believe that an acute ISH does not change to chronic convexity SH; in fact they present as simultaneous acute thin convexity SH and acute ISH. It is also concluded that in contrast to previous literature ISH and acute SH patients of similar neurological status have similar mortality rates.