2017-09-282017-09-282015-05-05ARAGÃO, José Ismael Viana de. Epidemiologia molecular do papilomavírus humano (HPV) em pólipos gástricos e colorretais. 2015. 61 f. Dissertação (Mestrado) – Universidade Federal do Pará, Núcleo de Medicina Tropical, Belém, 2015. Programa de Pós-Graduação em Doenças Tropicais.https://repositorio.ufpa.br/handle/2011/9123The word “polyp” refers to a macroscopically visible lesion or to a tumor that protrudes from a epithelial surface. The polyps can be classified as neoplastic or non-neoplasic cells. In Brazil, cancer in general is set as a public health problem of national dimensions. With the life expectancy increase of brazillian people, the growing industrialization and globalization, neoplasms have acquired a larger importance in the country’s mortality profile, raking second place with cause of death. Gastric, colon and rectal cancers are among the most prevalent ones in brazillian population. Human papillomavirus (HPV) has been listed as a risk factor associated with the presence of many kinds of cancers. Considering the capacity of the polyps to evolve into neoplasia, this study aimed to verify the prevalence of HPV in gastric and colorectal polyps. It has been analyzed 135 samples of paraffined blocks of gastric and colorectal polyps in patients over 18 years old residents in the state of Pará, divided into three groups: gastric hyperplastic polyps (GHP), colon hyperplastic polyps (CHP) and colon adenomatous polyps (CAP). The samples were collected during endoscopy or colonoscopy procedures. For detecting the presence of HPV it was used the technique of Polymerase Chain Reaction (PCR). The samples infected by HPV have been typed to HPV subtypes 6, 11, 16, 18, 31, 33, 35, 52 and 58 using specific probes in PCR in real time. This study was approved by the Research Ethics Committee of the Tropical Medicine Center of the Federal University of Pará (UFPA). The obtained data were compiled in a spreadsheet and the statistical analysis was performed by the software SPSS 20.0. 135 polyps were identified (87 in women and 48 in men), the majority of the study participants were between 50 and 69 years old. The obtained results indicate the presence of HPV in 57 samples (42.2% of cases). Five samples were positive for HPV 18, two samples were positive for HPV 16 and HPV 35. One sample was reagent for HPV 31, another for HPV 33 and another isolated for HPV 52. Two samples were co-infected by HPV 18 and 35. No sample (82.5%) was positive for the other tested types. The presence of HPV had no statistically significant difference between the groups (p = 0,306), whereas statistical significance has been found between the studied age groups (p = 0,004). The prevalence of HPV in the gastric and colorectal polyps found in this study suggests that HPV's presence might be an important etiological factor in the development of neoplastic lesions. Therefore further studies are needed to affirm the HPV relationship with gastric and colon cancer.Acesso AbertoDoença sexualmente transmissívelEpidemiologia molecularSaúde públicaCâncer gástricoCâncer colorretalPapilomavírus humano (HPV)PóliposPará - EstadoDissertaçãoCNPQ::CIENCIAS DA SAUDE::SAUDE COLETIVA::EPIDEMIOLOGIACNPQ::CIENCIAS DA SAUDE::SAUDE COLETIVA::SAUDE PUBLICACNPQ::CIENCIAS DA SAUDE::MEDICINA::CLINICA MEDICA::CANCEROLOGIA