Fig. 1

a. Gadolinium enhanced T1 MR image. The ependyma of the right lateral ventricle and the cavum septi pellucidi enhances intensively, as a sign of ventriculitis. Lateral ventricles are slightly enlarged. b. Unenhanced CT slice on the level of frontal horns. Hydrocephalus has progressed, especially on the right side, the right frontal horn has enlarged and the anterior part of cavum septi pellucidi deviates to the left. Cortical sulci are narrowed compared to the previous examination. c. General chronic periodontitis in both jaws and severe local bone loss with abscesses. Periapical abscess is indicated by arrow