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Computerized tomography scan axial with the neuronavigationally displayed tip of the endoscope (a) in a 25-year-old patient with a post-traumatic abscess in the interhemispheric fissure. Endoscopically, the anteromedial ventricular wall was perforated (b), and the abscess was aspirated (c). For puncture of the small abscess, neuronavigation was required
