Interhemispheric Subdural Hematoma Epidemiology
Interhemispheric subdural hematoma (ISH) had been considered extremely rare until identification with imaging studies.
IHSDHs are often referred to as rare entities. Results show they are common 1).
Interhemispheric subdural hematoma (IHSDH) is an uncommon type of subdural hematoma (SDH) because of their unusual location 2) 3). It accounts for approximately 6% of all traumatic SDH, or 0.8% of all hospitalized patients after head trauma 4) 5).
Till 1995, less than 70 cases were reported in the literature 6).
Only about 100 cases have been reported till 1997 7) 8) 9).
Interhemispheric ASDHs are usually unilateral but bilateral hematomas have also been reported. Interhemispheric ASDH usually occurs posteriorly in the majority of cases.