[Current developments in measuring quality of life with instruments of the European organisation for research and treatment of cancer (EORTC)].

Since many years, the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Group develops and validates measures for the assessment of quality of life in cancer patients, using high standards of methodology. These questionnaires are meant to be used primarily in clinical trials.As treatment strategies are changing and because of some -methodological criticism, the head and neck module EORTC QLQ-H&N35 is currently being revised and updated.In this paper, we will present the current state of work and other recent developments regarding the EORTC Quality of Life questionnaire development.