ECP 2022 Final Programme

E-Posters 152 E-PS-22 025 Pseudoanaplastic/symplastic giant cell tumour of bone: case report and review of the literature Syrine Moussa, Tunisia A. Baccouche, M. Krifa, A. Bdioui, W. Majdoub, S. Mestiri, S. Hmissa 026 An unusual presacral mass: case report Syrine Moussa, Tunisia S. Mestiri, W. Majdoub, O. Belkacem, S. Frini, A. Bdioui, S. Hmissa 027 An old Calcifying aponeurotic fibroma Carolina Padrão, Portugal M. Pimentão, M. Cipriano 028 Collagen orientation probed by polarized Raman spectra on 5μm-thick FFPET sections can be readably used for grading meniscal degeneration Dionysios Papachristou, Greece N. Prokopi, K. Andrikopoulos, A. Soto Beobide, G. Voyiatzis 029 Intracranial sclerosing epithelioid fibrosarcoma – a rare neoplasm in an unusual location Sofia Pedrosa, Portugal F. Moreira, A. Marques, J. Pinheiro 030 A case report of retiform hemangioen- dothelioma as pleural tumour with rib infiltration Tamara Pikivaca, Croatia A. Lukac, A. Mataic, S. Seiwerth 031 De-differentiated liposarcomas with heterologous and homologous elements: MDM2, CDK4 and DDIT3 testing on several blocks with homologous and heterologous elements is useful for diagnosis Daniela Proca, USA A. Lazim, J. Fu, I. Akhtar 032 Multiple enchondromatosis of the upper limb in combination with multiple hemangiomas in an 20-year-old patient with Maffuci syndrome Alexander Romanov, Russia M. Mnikhovich, D. Kushch, T. Bezuglova 033 Poorly differentiated chordoma, a rare type of chordoma, in a 2.5-year-old girl Müzeyyen Müge Savas, Turkey I. Tosun 034 Whole exome sequencing analysis of dedifferentiated chondrosarcoma Julian Schreier, Germany A. Roessner, S. Ullmann, D. Schanze, D. Jechorek, S. Franke 035 Pseudomyogenic Hemangioendothelioma in the thumb – report of a rare case Francisco Sousa Vieira, Portugal D. Sá, A. Coelho, J. Vizcaíno 036 Differential diagnosis of spleen sarcoma: cytokeratin-positive interstitial reticulum cell (CIRC) sarcoma – a rare extranodal presentation Anna Szumera-Cieckiewicz, Poland O. Kuczkiewicz-Siemion, K. Kurek, K. Seliga, T. Świtaj, P. Rutkowski 037 The conundrum of primary Rosai Dorfman disease of the bone – a very rare lesion Dana Tapoi, Romania A. Dumitru, R. Adam, M. Sajin, M. Costache, A. Iliesiu 038 Small cell osteosarcoma: a diagnostically challenging tumour arising on the rib Meriam Triki, Tunisia W. Abid, I. Saguem, T. Boudawara, A. Khanfir, T. Boudawara, R. Kallel 039 Why does not ossification of posterior longitudinal ligament involve an upper part of the axis? Takehiko Yamaguchi, Japan H. Imada