Xavier Matias-Guiu, M.D., Ph.D is Professor of Pathology at the University of Barcelona (2019- ) and Lleida (2002- ). He is also chairman of Pathology Hospital Universitari Arnau de Vilanova de Lleida (2002- ) and Hospital Universitari de Bellvitge, Barcelona Spain (2015- ). MD from University of Barcelona, 1981, PhD from Autonomous University of Barcelona, 1987. Training in Pathology in Hospital de Sant Pau, Barcelona, Spain, (1983-86). Postdoctoral fellowship in Research Pathology at New England Medical Center-Tufts University, Boston, USA (1991-92), with a part time activity at Massachusetts General Hospital, Harvard University, with Dr Scully. Faculty member of the Pathology Department Hospital de Sant Pau, Barcelona (1988-2002) with Dr Jaime Prat. Author of over 400 publications and member of several editorial boards (Virchow Archiv, Int J Gynecol Pathol, Sem Diagn Pathol, Endocrine Pathol). President, Sociedad Española de Anatomía Patológica (2019-21); Member of the Council of European Society of Pathology (2015-19). Member of the Executive committee (2009-2013), and President Elect (2019-21) , and President (2021-23) of the International Society of Gynecologic Pathologists; Member, the World Health Organization (WHO) panel for Classification of Tumours of the Female Genital Tract, (IARC, Lyon France; 2014 and 2020). ESGO guidelines for endometrial cancer (2014, 2020), ICCR Endometrial Cancer Histopathology Reporting Guide (2021), ESMO guidelines for homologous recombination deficiency in ovarian cancer (2020).