Objective: Investigation of the correlation between the colposcopic sign inner border and cervical intraepithelial neoplasia (CIN) 2 or 3 and its association with specific human papillomavirus (HPV) types and the age of the patient.
Study Design: Colpophotographs or cervicograms were taken from 947 women referred due to an abnormal cervical finding. Occurrence of the colposcopic sign inner border was evaluated retrospectively by 2 independent colposcopists. Histologic evaluation was based on punch or cone biopsies. Human papillomavirus testing was done using Hybrid Capture I or a polymerase chain reaction-based HPV test.
Results: The prevalence of the colposcopic phenomenon inner border in women with an atypical transformation zone was 7.6% (53/695). In 70% of women with inner border, CIN 2 or 3 was confirmed histologically. The sensitivity of the colposcopic sign inner border for detection of CIN 2 or 3 was 20%, and the specificity was 97%. In patients with inner border, the odds ratio for CIN 2 or 3 was 7.7 (95% CI=4.2-14.3). There was no significant association between inner border and any high-risk HPV type. Cervical intraepithelial neoplasia 2 or 3 associated with inner border was significantly more frequent in patients younger than 35 years.
Conclusion: Inner border is a rare colposcopic phenomenon but highly specific for CIN 2 or 3 in young women.
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