作者单位:Department of Pathology/Neuropathology, University Hospital Essen, University of Duisburg-Essen[1]Department of Otorhinolaryngology, University Hospital Essen, University of Duisburg-Essen[2]Department of Otorhinolaryngology, Ludwig Maximilians University, Marchioninistrasse 15-25, 81377[3]