RESUMO
Recurrent bacterial meningitis can be caused by acquired or congenital anatomic defects, infection, or alterations in immune mechanism. Intracranial anatomical defects possibly combined with trauma can be the major cause of recurrent bacterial meningitis. Mucocele is a chronic, expansile and cyst-like lesion of the paranasal sinuses, most frequently found in the frontal sinus containing sterile mucoid secretions. Secondary infection of a mucocele may create a pyocele. Although pathogenesis of a primary mucoceles remains uncertain, causatives factors of secondary mucoceles have been suggested to include chronic inflammation, trauma, allergy and obstructing tumors. We experienced a case of recurrent bacterial meningitis with frontal sinus mucocele, which might be secondary to cranial trauma.