Angelo Paolo Dei Tos, MD, is Director of the Department of Oncology, Director of the Department of Pathology at the General Hospital in Treviso, Italy, and Scientific Director of the vneto Region Cancer Registry. He is also Consultant Pathologist at the Istituto Ortopedico Rizzoli in Bologna and serves as contract Professor of Pathology at the University of Padua School of Medicine. Dr. Dei Tos is President of the Connective Tissue Oncology Society (CTOS), past Chairman and founder of the Working Group on Soft Tissue Tumour Pathology of the European Society of Pathology (ESP), past President of the International Society of Bone and Soft Tissue Pathology (ISBSTP), panel member for the WHO Working Group for the Classification of Tumours of Soft Tissue and Bone, member of the Soft Tissue and Bone Group of the European Organisation for Research and Treatment of Cancer (EORTC), and a faculty member of the European Society of Medical Oncology (ESMO). Dr. Dei Tos serves in the editorial boards of several scientific journals, including the Journal of Pathology; the American Journal of Clinical Pathology; the Journal of Clinical Pathology; Advances in Anatomic Pathology; Applied Immunohistochemistry & Molecular Morphology; Seminars in Diagnostic Pathology; Virchows Archiv; Pathologica, and Surgical Oncology. He is also co-editor in chief of the Open Access Journal Clinical Sarcoma Research. He has published more than 200 peer-reviewed articles, mainly focused on soft-tissue and tumour pathology/biology and oncological pathology. His main clinical interest is focused on sarcoma morphologic and molecular diagnosis.