Describe the features of a basilar skull fracture.?

Basilar skull fx: Basilar skull fracture is usually due to blunt trauma to the back of the head. It has unusual features besides from severe headache. Bruises may appear under the eyes ("raccoon eyes"), there may be bleeding behind the ear drum (only seen with an otoscope), and there may be clear watery fluid (CSF) running out the nose. You can also lose your sense of smell and have severe dizziness.