It is demonstrated by the different investigations that have been carried out on the possible causes of CA (cancer), which in it, contribute many factors as intrinsic as extrinsic, which can favor its appearance and development. Among the external factors most studied are cigarettes (lifestyle choices) and their relationship with the appearance of pulmonary CA in smokers, bricklayers are highly exposed to asbestos (Workplace exposure), which is a material that is widely used in the manufacture of sheets, which is the cause of lung CA and stomach CA, among others. There are other CAs that occur naturally (Naturally occurring exposure), as well as the prostate CA, which is the most common in older men.
