In recent years, there has been a dramatic increase in reports of work related musculoskeletal disorders associated with ergonomic or chronic trauma hazards in the workplace. Since these musculoskeletal conditions have only recently gained public attention, no uniform label or term for them has been adopted. Descriptive labels that have been used include wear and tear disorders, overuse injuries, Osteoarthroses, and degenerative joint diseases. More recently the terms "repetition motion injury," repetitive strain injury," and "myofascial or regional pain syndrome" have been used as nonmedical labels for worker symptoms of physical discomfort and the accompanying limitation of activity. In the United States, the label of "cumulative trauma disorder" (CTD) is most frequently applied to work-related conditions that affect structures of the musculoskeletal system. Labels using the term "injury" should be avoided because the majority of musculoskeletal conditions included in this category are not injuries, as normally defined. Employers, moreover, are required to record these conditions as illnesses in their annual Log and Summary of Occupational Injuries and Illnesses (OSHA Form No. 200).