Is the following true or false?
Fractures to the upper sinuses are the leading cause of cerebrospinal fluid (CSF) leakage into the nasal cavity and ears.

True-cerebrospinal fluid (csf) leaks are composed of csf rhinorrhea or otorrhea, which implies an abnormal communication between the subarachnoid space and the nasal cavity or tympanomastoid space. csf leaks may present in a number of ways, including middle ear effusion, hearing loss, or unilateral rhinorrhea secondary to eustachian tube drainage. therefore, the otolaryngologist must keep a high clinical suspicion. the diagnosis must be either confirmed or excluded as the risk of meningitis is high, with reported rates varying between 2-88%. the clinician must be aware of the diagnostic and treatment options available in order to best manage such patients.