Aspects of interhemispheric subdural haematoma, including the falx syndrome.

Two cases of interhemispheric subdural haematoma are reported. The first patient presented with a falx syndrome of contralateral hemiparesis, most marked in the lower extremity. The second patient had vertex headaches and was diagnosed with computerised tomography. Serial studies suggested that the interhemispheric haematoma may have migrated to a lateral position over the cerebral convexity.