Utilidad de la detección del virus del papiloma humano en el cribado de neoplasia intraepitelial anal en pacientes con conductas de riesgo / Usefulness of human papillomavirus testing in anal intraepithelial neoplasia screening in a risk behaviour population

INTRODUCCIÓN: La incidencia de la neoplasia intraepitelial anal está en aumento en determinados grupos con conductas de riesgo, y en su etiopatogenia está implicada la infección por el virus del papiloma humano (VPH). Dentro de los programas de cribado implementados en las últimas décadas se encuentra el uso sistemático de la citología anal y, más recientemente, la detección del VPH mediante captura de híbridos y genotipado. MATERIAL Y MÉTODO: Estudio de cohortes retrospectivo de la población con conductas de riesgo de desarrollar neoplasia intraepitelial anal atendida en la consulta de Infecciones de Transmisión Sexual del área de Dermatología del Hospital Costa del Sol desde enero de 2010 a diciembre de 2012, a la que se le realizó cribado de neoplasia intraepitelial anal mediante toma de citología anal y genotipado de VPH. RESULTADOS: El 50% de la población estudiada tenía infección por VIH. Se encontró una alta frecuencia de displasia anal y presencia de VPH en la citología (82,1%) y genotipado (79%). Se obtuvo una asociación estadísticamente significativa (p < 0,005) entre la presencia de genotipos de VPH de alto riesgo y la presencia de displasia de alto grado en la segunda citología dirigida. El genotipado de VPH permitió identificar 17 casos (22%) de displasia severa infradiagnosticados en la primera citología. CONCLUSIÓN: La citología anal a ciegas puede infradiagnosticar casos de displasia de alto grado. La detección de VPH puede complementar este procedimiento, permitiéndonos identificar aquellos pacientes con mayor riesgo de desarrollar displasia anal de alto grado

INTRODUCTION: The incidence of intraepithelial anal neoplasia is increasing in certain risk behaviour groups, and human papillomavirus (HPV) infection is involved in its pathogenesis. The systematic use of anal cytology, and more recently HPV detection by hybrid capture and genotyping, have been introduced into screening programs in recent decades. MATERIAL AND METHODS: A retrospective cohort study was carried out on individuals with risk behaviours of developing intraepithelial anal neoplasia and who attended Sexually Transmitted Infections clinics in the Dermatology area of the Hospital Costa del Sol from January 2010 to December 2012. The intraepithelial anal neoplasia screening was performed using anal cytology and HPV genotyping. RESULTS: Half (50%) of the study population were HIV positive. A high frequency of anal dysplasia and presence of HPV in cytology (82.1%) and genotype (79%) was found. A statistically significant association (P < .005) was obtained between the presence of high-risk HPV genotypes and the presence of high-grade dysplasia in the second directed cytology. HPV genotyping enabled 17 cases (22%) of severe dysplasia to be identified that were under-diagnosed in the first cytology. CONCLUSION: Cases of high-grade dysplasia can be under-diagnosed by a first anal cytology. Detection of HPV can supplement this procedure, leading to the identification of those patients most at risk of developing high-grade anal dysplasia

[Usefulness of human papillomavirus testing in anal intraepithelial neoplasia screening in a risk behaviour population]. / Utilidad de la detección del virus del papiloma humano en el cribado de neoplasia intraepitelial anal en pacientes con conductas de riesgo.

INTRODUCTION: The incidence of intraepithelial anal neoplasia is increasing in certain risk behaviour groups, and human papillomavirus (HPV) infection is involved in its pathogenesis. The systematic use of anal cytology, and more recently HPV detection by hybrid capture and genotyping, have been introduced into screening programs in recent decades. MATERIAL AND METHODS: A retrospective cohort study was carried out on individuals with risk behaviours of developing intraepithelial anal neoplasia and who attended Sexually Transmitted Infections clinics in the Dermatology area of the Hospital Costa del Sol from January 2010 to December 2012. The intraepithelial anal neoplasia screening was performed using anal cytology and HPV genotyping. RESULTS: Half (50%) of the study population were HIV positive. A high frequency of anal dysplasia and presence of HPV in cytology (82.1%) and genotype (79%) was found. A statistically significant association (P<.005) was obtained between the presence of high-risk HPV genotypes and the presence of high-grade dysplasia in the second directed cytology. HPV genotyping enabled 17 cases (22%) of severe dysplasia to be identified that were under-diagnosed in the first cytology. CONCLUSION: Cases of high-grade dysplasia can be under-diagnosed by a first anal cytology. Detection of HPV can supplement this procedure, leading to the identification of those patients most at risk of developing high-grade anal dysplasia.