Monday, 10 September 2012, 17.00-19 .00, Forum Hall OFP-08 Oral Free Paper Session Head and Neck Pathology OFP-08-001 Human papilloma virus associated oropharyngeal carcinoma is strongly correlated with cancer of unknown primary S. Ihrler * , G. Assmann, P. Zengel, M. Mollenhauer * Medizin. Universität München, Institut für Pathologie, Germany