Environmental factors and XXXX .

@entity2214 @entity1 @entity981 @entity7935 @entity1778 @entity6444 @entity1860
Investigations on the association between environmental hazards and the development of various types of @entity1778 are reviewed. Regarding @entity981 ( @entity981 ) exposure to ionizing radiation is a well-documented risk factor. According to several recent studies exposure to strong electromagnetic fields may be suspected to be of etiologic importance for @entity981 . There is evidence that occupational handling of @entity7935 is a risk factor and other organic solvents may also be leukaemogenic. Occupational exposure to petrol products has been proposed to be a risk factor although the hazardous substances have not yet been defined. Results of cytogenetic studies in @entity981 suggest that exposure to certain environmental agents may be associated with relatively specific @entity2214 . These results are of interest because it has been proposed that chromosomal rearrangements may play a role in the activation of cellular oncogens. Exposure in utero to ionizing radiation has been proposed to be a risk factor for @entity981 ( @entity981 ) in @entity1 . Unlike @entity981 there seems at present to be little evidence that @entity981 is related to exposure to some chemicals. @entity1860 ( @entity1860 ) may follow exposure to high doses of ionizing radiation whereas such exposure seems to be of insignificant importance for the development of @entity6444 ( @entity6444 ). According to some studies an abnormally high incidence of @entity6444 may be found among farmers in the USA. These results have not been confirmed in Scandinavian studies. There seems to be little evidence that @entity1860 or @entity6444 are related to occupational handling of some chemicals.(ABSTRACT TRUNCATED AT 250 WORDS)
