Bleeding may occur in the part of the brain containing most of the cerebral spinal fluid (CSF). This compartment is the ventricular system. Cerebral Spinal Fluid is mostly made in the ventricular system of the brain. This fluid circulates throughout the brain as well as down the spine. This is the same fluid which is obtained with a spinal tap (lumbar puncture).
Place your mouse arrow on the right picture and click the forward arrow. Notice how the fluid filled ventricular system(drawn in purple) occupies space in all the lobes of the brain.