рак мозга

Онкогенный the potential папилломавирусов essentially varies; on ability to initiate диспластические (precancer) changes and a cancer папилломавирусы are conditionally divided{shared} into groups of "high" and "low" risk of occurrence of tumoral transformation infected эпителия. Types ВПЧ 6,11, 42, 43, 44 have been classified as types of low risk of development of a cancer, types 16, 18, 48, 56 - high risk. So, ВПЧ types 6 and 11 are the reason peaked кондилом, are frequently identified at дисплазиях easy and average degrees of weight and are seldom connected to tumours шейки a uterus. ВПЧ types 16 and 18 prevail of other types папилломавирусов at РШМ, ВПЧ type 16 comes to light in 50-70 % of cases, in 10-20 % comes to light ВПЧ type 18, other types ВПЧ of high risk come to light much less often [13,14,21]. Most frequently meeting 16 type of a virus is determined, it{he} is revealed in 21 % of cases CIN-I, in 57 % of cases CIN-II-III. With an infection types of a virus 16 and 18 associate 67-93 % of cases РШМ, the virus of type 18 is found out approximately in 2 times less often than a virus of type 16 [11,13.15,18]. The virus of a papilloma of type 18 is associated with development аденокарцином, has higher онкогенный potential, with it{him} connect fast rate of a tumoral progression, a low level of a differentiation infected эпителия, the adverse forecast others онкогенными types [12,14]. Подробнее...

The opportunity of interrelation неоплазий шейки a uterus with venereal diseases was for many years discussed. In group of the women suffering инвазивным РШМ, higher frequency of revealing of nonspecific microflora is marked, switching трихомонадные and гарднерелловы infections [3,6]. Examples of such influence were discussed in attitude{relation} Treponema pallidum, Neisseria gonorrhoeae, Chlamydia trachomatis, a virus of a simple herpes of type 2, a cytomegalovirus, a virus of a papilloma of the person [3,19]. Epidemiological researches have convincingly shown, that a conclusive risk factor of occurrence of precancer changes and a cancer шейки a uterus is генитальная папилломавирусная the infection, accompanying папилломавирусной infections of sexual ways influence at early stages of development неоплазий and do not influence on already arisen РШМ [5,13,14,23]. Подробнее...