“…Meanwhile, there has been a tendency among radiologists as well as internists to consider the possibility of thesaurosis in the differential diagnosis of diffuse pulr:nonary lesions. 10 Apart from clinicopathological or histochemical considerations, studies of risk population have been carried out concurrently. In these studies it is assumed that, if hair spray could cause thesaurosis, the highest incidence of the condition would be found among professional users of hair spray.…”