TY - JOUR JO - Polish Journal of Pathology SN - 1233-9687 VL - 60 IS - 1 PY - 2009 ID - Ptaszyński2009 TI - HER2, EGFR and TOPIIA gene amplification and protein expression in synovial sarcoma before and after combined treatment AB - Synovial sarcoma (SyS) occurs mostly in young adults and is characterized by an aggressive course. Combined treatment including chemotherapy, radiotherapy and surgical excision of the tumour is still not satisfactory, with mean 5-year survival of 30-50%. New targeted treatment options have appeared recently, e.g. HER2 and EGFR antagonists. Initial studies have revealed immunohistochemical overexpression of the EGFR in SyS; therefore trials with EGFR antagonist therapy have commenced. The aim of our study was to evaluate the status of HER2, EGFR and TOPIIA in SyS before and after combined therapy. Immunohistochemistry and FISH tests were performed. Significant discrepancies between protein expression and gene status were found. The authors discuss the potential reasons for that phenomenon. AU - Ptaszyński, Konrad AU - Szumera-Ciećkiewicz, Anna AU - Zakrzewska, Klara AU - Tuziak, Tomasz AU - Mrozkowiak, Anna AU - Rutkowski, Piotr SP - 10 EP - 18 DA - 2009 UR - https://www.termedia.pl/HER2-EGFR-and-TOPIIA-gene-amplification-and-protein-expression-in-synovial-sarcoma-before-and-after-combined-treatment,55,12402,1,1.html ER -