Approximately 59% of recurrent meningitis cases are due to such anatomical abnormalities, 36% are due to immune deficiencies (such as complement deficiency, which predisposes especially to recurrent meningococcal meningitis), and 5% are due to ongoing infections in areas adjacent to the meninges.
Sekitar 59% kasus meningitis rekuren disebabkan abnormalitas anatomi yang demikian, 36% akibat defisiensi kekebalan (seperti defisiensi komplemen, yang secara khusus cenderung menyebabkan berulangnya meningitis meningokokus), dan 5% disebabkan oleh infeksi berkelanjutan di daerah yang berdekatan dengan meningen.