title: [Anogenital Warts in a Major Venereology Clinic: Centro de Saúde da Lapa - Lisbon, 2008 to 2014].
abstract: BACKGROUND
  Human papillomavirus infection is the most common sexual transmitted infection in the world, being associated with different diseases, namely anogenital warts, recurrent respiratory papillomatosis and anal, cervical, and oropharyngeal cancers. Among sexually active people, approximately 1% has anogenital warts, 90% of cases resulting from genotypes 6 and 11.
  
  
  METHODS
  Patients diagnosed with first episode of anogenital warts from 2008 to 2014 in Lisbon's major venereology clinic were identified, and characterized according to sex, sexual orientation, age, warts location, and number of sexual partners.
  
  
  RESULTS
  We observed a statistically significant decrease in first anogenital warts diagnosis among < 19 year old females (r = -0.848;p = 0.016) and a non-statistically significant decrease among < 19 ' year-old males and among 20 ' 24 year old females.
  
  
  CONCLUSIONS
  In October 2008, the quadrivalent vaccine (genotypes 6, 11, 16, 18) was introduced in the Portuguese national vaccination program, targeting 13-year-old females, with a catch-up for 17 year old females. In the women'´s group, decrease in first anogenital warts diagnosis is probably related to human papillomavirus vaccination before onset of sexual activity.
  
  
  CONCLUSIONS
  This study reinforces the importance of national human papillomavirus vaccination program.
authors.affiliation: Serviço de Dermatologia. Centro Hospitalar e Universitário de Coimbra. Coimbra.
authors.forename: Ana
authors.initials: A
authors.lastname: Gameiro
authors.affiliation: Serviço de Dermatologia. Hospital Garcia da Orta. Almada.
authors.forename: João
authors.initials: J
authors.lastname: Alves
authors.affiliation: Consulta de Doenças Sexualmente Transmissíveis. Centro de Saúde da Lapa. Lisboa.
authors.forename: Irene
authors.initials: I
authors.lastname: Santo
authors.affiliation: Consulta de Doenças Sexualmente Transmissíveis. Centro de Saúde da Lapa. Lisboa.
authors.forename: Jacinta
authors.initials: J
authors.lastname: Azevedo
mesh_terms: D000293:Adolescent; D000328:Adult; D001004:Anus Diseases / Q000175:diagnosis / Q000453:epidemiology; D003218:Condylomata Acuminata / Q000175:diagnosis / Q000453:epidemiology; D005260:Female; D005831:Genital Diseases, Female / Q000175:diagnosis / Q000453:epidemiology; D005832:Genital Diseases, Male / Q000175:diagnosis / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011174:Portugal; D012189:Retrospective Studies; D013997:Time Factors; D055815:Young Adult