Before revision: In neurology, mass effect is a general term applied to the effects exerted by any mass, including, for example, an evolving intracerebral hemorrhage (a bleeding within the skull) presenting with a clinically significant hematoma.
After revision: In neurology, mass effect is the effecta exerted by any mass, including, for example, an evolving intracerebral hemorrhage (a bleeding within the skull) presenting with a clinically significant hematoma.