The possibility of primary and secondary prevention of the uterine crvico cancer has grown in the last few decades to the measure that increases the knowledge concerning the factors of risks that involve the illness. The cancer can be decurrent of internal and external factors to the organism, being both interrelated. The external factors are said ambient, corresponding the 80 90% of the cases, and the interns are, in its majority, the tumors genetically predetermined (DAVIM et al., 2005). It is important to add, on the basis of hospital registers of cancer, that 50% of the carrying women of the illness had been diagnosised in stadiums III and IV. This probably reflects the difficulty of precocious diagnosis, the lack of information and the difficulty of access of the woman to the net of health (ALMEIDA; FEITOSA, 2007).
The cancer of the col of the uterus is initiated slowly from an daily pay-invasive injury, that generally advances per years, before reaching invading stadiums of the illness, being: Stadium I A1 (invasion of estroma, 3 mm and up to 5 mm of depth and 7mm of extension). The average period in way to the detention of a lightweight displasia (HPV, NIC I) and the development of carcinoma in situ is of 58 months, while for the moderate displasias (NIC II) this time is of 38 months, in the serious displasias (NIC III) of 12 months. In particular, they is esteem that the great majority of the injuries of low state will regredir spontaneously, while about 40% of the treated injuries of high degree they will not evolve for invading cancer in an average period of 10 years. The National Institute of Cancer of the United States calculates that only 10% of the carcinoma cases in situ will evolve for invading cancer in the first year, whereas 30% 70% will have evolved passed the 10 12 years, in case that treatment is not offered (INCA/MS, 2000).