====== Frontal sinusitis ======
Because of its location and the fragility of its physiology, the [[frontal sinus]] is the first of the facial sinuses to cause complications. In this context, orbital sepsis, cranial vault osteitis, meningitis, cerebral abscess, longitudinal sinus thrombophlebitis can occur. A more uncommon consequence of frontal sinusitis is isolated epilepsy.

An epilepsy seizure can follow a frontal sinusitis. It does not convey the existence of an endocranial complication but requires researching it. The posterior wall lysis of the sinus with a bare dura mater is sufficient to lead to a seizure in case of sinus infection
((Duvillard C, Gazzano E, Lecomte H, Romanet P. [Frontal sinus pathology and
epilepsy]. Ann Otolaryngol Chir Cervicofac. 2007 Jul;124(3):126-30. French.
PubMed PMID: 17475201.)).