ECP 2023 Final Programme

E-Posters 149 ECP 2023 Dublin E-PS-12 036 Oropharyngeal squamous cell carcinoma: prevalence of Human papillomavirus infection Amal Maaoui, Tunisia S. Kamoun, Y. Houcine, K. Hamza, N. Ben Othmen, S. Elfekih, I. Bettaieb, A. Goucha, S. Mhalli, F. Ammous, C. Hmaied, M. Dhaha, S. Kedous, M. Driss 037 Mandibular chondrosarcoma: a report of four cases Wiem Majdoub, Tunisia K. Ben Lazreg, S. Mestiri, Z. Lajmi, O. Belkacem, D. Benletaifa, A. Bdioui, S. Hmissa 038 Post-traumatic proliferative activity of the nasal epithelial cells under experimental injury and repair therapy conditions Angelina Malysheva, Russia O. Reshetnikova, I. Berest, O. Teleshova, E. Burgelo 039 Merkel cell carcinoma in maxillary sinus. Case report and literature review Jorge Salvador Marrero Afonso, Spain I. Expósito Afonso, L. Martínez Blanco, K. Gallardo Rodríguez, S. Carrión Marrero, A. Nazco Deroy, F. García Machado 040 Acquired encephalocele mimicking a glomus tumour. Case report and literature review Jorge Salvador Marrero Afonso, Spain I. Expósito Afonso, L. Martínez Blanco 041 Extramedullary plasmacytoma in nasophar- ynx. Case report and literature review Jorge Salvador Marrero Afonso, Spain S. Carrión Marrero, K. Gallardo Rodríguez, C. Febles Pérez 042 Nasopharyngeal hairy polyp in a male adult: a case report Nei Menezes, Brazil A. Lança Neto, M. Mendes Las Casas Moreira, F. Fernandes Guimarães, C. Issa de Azevedo 043 Sclerosing odontogenic carcinoma – a case report of a rare lesion Karwan Moutasim, United Kingdom R. Webb 044 Sarcoma mimicking an epithelial malignan- cy in the head and neck: a cytomorphologi- cal diagnostic challenge Martina Munonyara, United Kingdom A. Sandison 046 Human papillomavirus (HPV)-related multiphenotypic sinonasal carcinoma: analysis of three cases with uncommon HPV subtypes Jong Hee Nam, Korea Y. Choi 047 The first reported case of intraparotid ganglioneuroma masquerading as a malignancy Bacem Othman, Hungary 048 Insights into investigating the pathogenesis of salivary carcinoma ex adenomas with taxonomical implications Bacem Othman, Hungary 049 Chondromesenchymal hamartoma and DICER-1 mutation: a case report and literature review Alba Prat, Spain L. López, M. Campos, D. Piñol, J. Gras, M. Casasayas, J. Szafranska 050 Case report: Epithelial-myoepithelial carcinoma in the nasal cavity- a diagnostic pitfall in frozen section evaluation Tina Rattay, Germany J. Knolle, C. Taege, A. Haak, J. Lautermann