Azerbaijan currently has diplomatic relations with 160 countries: Afghanistan, Bahrain, Belarus, Belgium, Bulgaria, Canada, the People's Republic of China, Denmark, Egypt, France, Georgia, Germany, Greece, Hungary, Iran, Iraq, Republic of Ireland, Israel, Italy, Japan, Kazakhstan, Kyrgyzstan, Kuwait, Libya, Luxembourg, Mexico, Moldova, Mongolia, ...
Most basal cell and squamous cell skin cancers are caused by repeated and unprotected skin exposure to ultraviolet (UV) rays from sunlight, as well as from man-made sources such as tanning beds. UV rays can damage the DNA inside skin cells.DNA is the chemical in each of our cells that makes up our genes.esearchers donât yet know all of the DNA changes that result in skin cancer, but they have found that in many skin cancers the cells have changes in tumor suppressor genes. The gene most often altered in squamous cell cancers is called TP53. This tumor suppressor gene normally causes cells with damaged DNA to die.
Squamous cell carcinomas may also occur where skin has suffered certain kinds of injury: burns, scars, long-standing sores, sites previously exposed to X-rays or certain chemicals (such as arsenic and petroleum by-products). In addition, medications or diseases that suppress the immune system may encourage development of squamous cell carcinoma.