Case History: Case A

A 59-year-old woman was hospitalized with the diagnosis of proliferative leukemic crisis. Two weeks after admission,she sustained a left hemiplegia followed by right fixed dilated pupil, coma and death. At autopsy, a massive hemorrhage was present in the right cerebral hemisphere, as well as lesions in the brainstem. In the image, what level of the brainstem is shown, and what type of lesion is this?