The Utility of Short-Course Radiotherapy in a Watch-and-wait Strategy for Rectal Cancer – the Need to Measure the Interval to Tumour Response Assessment from the Radiation Start

Lucyna Pietrzak, Anna Cencelewicz, Andrzej Rutkowski, Anna Hołdakowska, Karol Paciorek, Michał Jankowski, Wojciech Zegarski, Joanna Reszke, Przemysław Wawok, Piotr Richter, Krzysztof Małecki, Jolanta Szelachowska, Marek BeRbenek, Iwona Gisterek, Malgorzata Jankiewicz, Wojciech Michalski, Joanna Socha, Agnieszka Z ołciak-Siwi nska, Krzysztof Bujko and for the Polish Colorectal Study Group Department of Radiotherapy I, M. Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland; Department of Gastroenterological Oncology, M. Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland; Department of Radiology, M. Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland; Chair of Surgical Oncology, Collegium Medicum Nicolaus Copernicus University, Oncology Center—Prof Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz, Poland; Department of Radiotherapy, Collegium Medicum Nicolaus Copernicus University Oncology Center—Prof Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz, Poland; Ist Department of General Surgery, Jagiellonian Medical University College, Krak ow, Poland; Department of Radiotherapy, University Children’s Hospital, Krak ow, Poland; Department of Oncology, Wroclaw Medical University, Wrocław, Poland; Department of Radiotherapy, Wrocław Comprehensive Cancer Centre, Wrocław, Poland; Department of Surgery, Lower Silesian Oncological Centre, Wrocław, Poland; Department of Radiotherapy, Nu-Med Group, Zamo s c, Poland; Department of Radiotherapy, St. John’s Cancer Center, Lublin, Poland; Bioinformatics and Biostatistics Unit, M. Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland; Department of Radiotherapy, Military Institute of Medicine, Warsaw, Poland; Department of Radiotherapy, Regional Oncology Center, Czestochowa, Poland; Department of Gynecological Oncology, M. Skłodowska-Curie National Research Institute of Oncology, Warsaw, Poland