Clinical symptoms of the SVT are unspecific. In cases of an acute mastoiditis, neurological signs might be pathognomonic and can direct to a LST. Therapeutic concepts comprise intravenous antibiotics and operative elimination of disease. The exposition of the lateral sinus should be performed in any mastoidectomy for a LST in order to scrutinize its blood flow. In case of a thrombosis additional anticoagulative therapy might be indicated. To exclude a 2-staged brain abscess control MRI scans 7 through 14 days postoperatively are recommended.