title: [Video colposcopy in diagnosis of cervical squamous intraepithelial lesions].
abstract: OBJECTIVE
  To study the accuracy and efficiency of video colposcopy in diagnosis of cervical squamous intraepithelial lesions and clinical significance of seven colposcopic signs.
  
  
  METHODS
  Two hundred and seventy-five patients with an abnormal cervical smear or vulva condyloma acuminata were re-evaluated by video colposcopy. 265 cervical biopsies performed under the guidance of video colposcopy for pathological study, as well 8 endocervical curettage (ECC) and 237 loop electrosurgical excision procedure (LEEP).
  
  
  RESULTS
  The sensitivity, specificity and positive rate of video colposcopy in evaluation of cervical squamous intraepithelial lesions were 95.9%, 77.7%, and 84.5%. Video colposcopy diagnostic accuracy was 93.8% tally with the pathological results in observing normal transformation zone. False negative rate was 6.1%. 76.2% of cases with subclinical papillomavirus infection by acetowhite epithelium, while false negative rate was 23.7%. Twin signs, triple signs and cervical carcinoma were 100.0% tallying with the diagnosis of cervical lesions.
  
  
  CONCLUSIONS
  Video colposcopy can be a very accurate diagnostic method in clinical practice. It is quite sensitive in diagnosis of severe cervical lesions. However, there was a relative high false negative rate in diagnosing mild cervical lesions.
authors.affiliation: Department of Obstetric and Gynecology, Beijing Chaoyang Hospital, Capital University of Medical Science, Beijing 100020, China.
authors.forename: X
authors.initials: X
authors.lastname: Song
authors.forename: Q
authors.initials: Q
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Song
mesh_terms: D003127:Colposcopy / Q000379:methods* / Q000592:standards; D005260:Female; D006801:Humans; D030361:Papillomavirus Infections / Q000175:diagnosis*; D012680:Sensitivity and Specificity; D014412:Tumor Virus Infections / Q000175:diagnosis*; D002577:Uterine Cervical Diseases / Q000175:diagnosis*; D014741:Video Recording