Skin Cancer Research

 

(1) chemical carcinogen
     Since the first description of Percivall chimney sweep made the workers reported that scrotal skin cancer after 100 years or so, it is found that frequent contact with arsenic, tar and asphalt workers prone to skin cancer.

(2) ultraviolet radiation
     1928 Findlay First of all mercury produced by the application of ultraviolet radiation induced mice skin cancer. Skin cancer were more common in farmers, fishermen and outdoor workers, and good fat in the Head, the back of the hand, such as sunlight exposure-prone areas, to prove the occurrence of skin cancer is closely linked with ultraviolet radiation. In addition, the epidemiologists found that living in equatorial regions of the whites, the incidence of skin cancer than those living in the white areas away from the equator is higher and the incidence of skin cancer and is inversely proportional to the laws of latitude, also sets out the ultraviolet rays carcinogenesis: the lower latitudes from the equator, the closer, the greater the amount of ultraviolet radiation, the incidence of skin cancer higher; the other hand, the high latitudes, far from the equator by a small amount of ultraviolet radiation, the incidence of skin cancer on the low.

 

(3) of ionizing radiation

     Radiation has long been engaged in the work of the past due to neglect of radiation protection measures and lead to dry skin disease based on the occurrence of skin cancer, in recent years due to improvements in radiation equipment and radiation technology, in particular the strengthening of the protective measures, the Occupational Basically, skin cancer has become extinct. However, in some patients to receive radiation therapy after a few years later, in the radiation field occurred in the cases of skin cancer and can still be met. Ionizing radiation of skin cancer is still a risk factor.

(4) pre-cancerous lesions
     Some of the nature of skin disorders such as actinic keratosis (actinic keratosis), xeroderma pigmentosum prone to skin cancer. Burn scars, as well as prolonged chronic non-healing skin ulcers, fistula, sinus inflammation in patients with chronic repeated stimulation are prone to skin cancer, malignant transformation.