Musculoskeletal disorders of the upper-extremity and neck are extremely common and one
of the major causes of disability, sickness absence and health care use all around the world.
The conditions do not threaten life, but they result in considerable discomfort for the patient and financial burden to society. Various names are given to musculoskeletal disorders
of the upper extremity and various project have been conducted to achieve consensus on
diagnostic criteria. However, a complete overview of all musculoskeletal neck and upperextremity disorders coupled with a classification system that can be multidisciplinary
approved was still missing. This thesis reported on the development of a new approach for
terminology and classification of these disorders: CANS (complaints of the arm, neck and/or
shoulder) and the CANS model.