Synonyms of decompression illness (DCI) are dysbaric illness (DI), decompression sickness (DCS), decompression accident or caisson disease. As DCS and AGE quite often occur together, these are commonly summarised as DCI or DI which is used as the preferred term for decompression-related accidents. DCS alone is rather subject to inert gas bubbles related to decompression effects as aetiology by itself. Neurological symptoms of DCS might be quite similar to AGE caused by pulmonary barotrauma. However, spinal symptoms are only found in DCS. DCI is a spectrum, which may have no symptoms at all, minor unspecific symptoms like fatigue up to fatal complications.