“…The exact mechanism of late pulmonary complication of SM exposure are not fully defined (14).Although the pathogenesis of COPD has completely determined and is mainly dependent on chronic inflammation and oxidative stress following activation of airway inflammatory cells, but there are few studies about the inflammatory basis of mustard lung (8,9,15).The pathological studies have shown that mustard lung is a neutrophilic / lymphocytic disorder (16,17).Also bronchiolar disease with varying degrees of inflammation as the main pathological finding, was demonstrated in a recent pathologic study in patients with sulfur mustard injury (18 ). According to the previous pathological studies, it seems that activation of inflammatory cells and generation of reactive oxygen species resulting in oxidative stress be involved (16,17).…”