Abstract
Computed tomography often demonstrates a well-demarcated low density area which is encountered around high density lesions in cases of acute intracerebral hematoma. This region on magnetic resonance imaging (T1-weithted images) was observed as a well-demarcated low intensity area. When we performed stereotactic aspiration the low density area disappeared or decreased in volume after initial aspiration of the hematoma. The level of fibrin degradation products (FDP) in the aspirated hematoma was extremely high. These findings suggest that the low density area may consist of serous components as a result of blood clot retraction. We named this kinds of feature on computed tomography as a “double density hematoma”. This region should be considered as a poriton of the intracerebral hematoma.
