ECP 2023 Final Programme

E-Posters 127 ECP 2023 Dublin E-PS-06 050 Malignant gastrointestinal neuroectodermal tumour with SMARCA4 mutation Lea Korsa, Croatia M. Abramović, L. Kovačević, P. Jurešić, I. Veliki Dalić, Z. Marusic 051 Collagenous gastritis: a case series and literature review Eda Nur Kozan, Turkey S. Yüksel, B. Savaş, A. Ensari 052 Microsatellite instability in ampullary adenocarcinoma Vladyslav Kropelnytskyi, Ukraine V. Shkarban, I. Romasko, I. Grygorova 053 Frequency of Her-2/neu positivity in ampullary adenocarcinoma Vladyslav Kropelnytskyi, Ukraine V. Shkarban, I. Romasko, I. Grygorova 054 Imunohistochemical study of morphologic impact of microsatellite instability (MSI) in malignant colorectal cancer (CRC) of local population Milda Kupryte, Lithuania T. Navickis, N. Cesana, L. Poškienė 055 Gastrointestinal stromal tumour case report series and evaluation of prognostic parameters Evin Kussever, Turkey T. Toyran, E. Kilic Bagir, A. Acikalin 056 Lymphomas with primary gastrointestinal presentation: 5 years’ experience in a quaternary care centre in Southern India Archana Lakshmanan, India D. Maria George, A. Subramanyam 057 The prognostic value of the co-expression of Programmed Death-Ligand 1 (PD-L1) and Ki-67 in colorectal cancer: insights from a northern Portuguese patient cohort Nuno Lamas, Portugal I. Havenko, F. Sousa, S. Martins 058 AMACR – a marker to differentiate between primary jejunal and metastatic adenocarci- noma Antonia Carmen Georgescu, Romania M. Sajin, T. Georgescu 059 Anal hidradenoma papilliferum, unexpected finding in hemorrhoidectomy. Case report Rocío Del Pilar López Panqueva, Colombia D. Ellmer, M. Rolon Cadena, J. Padron 060 Use of routine special stains for gastric and esophageal biopsies Ines Mallek, Tunisia O. Belkacem, B. Bouchabou, M. Mbarek, A. Lahmar, D. Bacha, S. Ben Slama 061 Clinicopathological features of colorectal cancer in patients younger than 40 years of age in Northern Tunisia Ines Mallek, Tunisia S. Ben Slama, B. Bouchabou, M. Mbarek, M. Hajri, H. Mestiri, A. Lahmar, D. Bacha 062 Predictive factors for histological response to neo-adjuvant treatment in rectal cancers Ines Mallek, Tunisia S. Ben Slama, B. Bouchabou, M. Mbarek, M. Hajri, H. Mestiri, A. Lahmar, D. Bacha 063 Intestinal spirochaetosis: review of cases diagnosed in a third level hospital Javier Martínez Castillón, Spain S. Vicente Arregui, E. Del Valle Sánchez, M. Trigo Cebrián, C. Hörndler Argarate, J. Delgado Fernández, N. Martínez Arnau, A. Carilla Sanromán, L. Leon, L. Ollero Domenche 064 Differences in immunohistochemical expression of filaggrin between proton pump inhibitor-non-responders and proton pump inhibitor-responders of eosinophilic oesophagitis Riruke Maruyama, Japan N. Ishimura, A. Araki, M. Yuki, N. Nagano