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A 57 year-old man with hypertension presented with an acute right hemiplegia and headache. On exam, both eyes were looking to the right. The patient was unable to look left.
Axial CT scan of the head at the level of the mid-pons. Note the large white area, which corresponds to acute hemorrhage in the lateral left pons. Also note some edema extending into the cerebellum. Because of its location, the patient has a right sided hemiplegia (from involvement of the corticospinal tract in the left pons) and a left gaze palsy (from involvement of the horizontal gaze center in the left pons).
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