According to the World Health Organization, cancer rates in developing countries are progressively approaching those in the industrialized countries, due mainly to an increase in the average age of the population, the control of other diseases, and the increase in use of tobacco.
Lung cancer, which is rapidly increasing in most countries--especially in women--is likely to become the dominant cancer worldwide by the end of this century. Breast cancer death rates are generally rising, in spite of some recent declines.
Prevention of lung cancer requires comprehensive legislative and educational measures to control use of tobacco. Breast cancer mortality is likely to decrease with public awareness of the importance of early detection and prompt treatment.
Cervical cancer is a rapid, uncontrolled growth of severely abnormal cells on the cervix, the lower part of the uterus that opens into the vagina. Most abnormal cervical cell changes that develop into cancer are caused by infection with high-risk types of human papillomavirus (HPV).