ABSTRACT
The diagnosis of infarction is generally not difficult. A scan during the acute episode of cerebral infarction does not contrast enhance and the lesion may be visible only on diffusionweighted MR images, a pattern very sensitive for the diagnosis of stroke. The lesion itself is far more diffuse than one sees with wellcircumscribed brain metastases. Cerebral hemorrhage may be more difficult. Patients receiving chemotherapy for cancer are often thrombocytopenic and susceptible to brain hemorrhage. Others may be hypercoagulable and suffer venous sinus occlusion, leading to hemorrhagic infarction.
