Reliability of colposcopy during pregnancy

Objective: To investigate the reliability of colposcopy during pregnancy and to evaluate the concordance between colposcopic patterns and histopathological findings in these women.

Study design: Multicenter observational study of women diagnosed with an abnormal cervical cytology, who subsequently underwent a colposcopic evaluation with cervical biopsy during pregnancy. The "colpo-histopathological concordance‿ was evaluated. The "colposcopic overestimation and underestimation‿ were evaluated as well.

Results: 69 women, fulfilling the study inclusion/exclusion criteria, constituted the study cohort. Among them, on colposcopic examination, 14 women (20.3%) showed "grade I abnormal colposcopic findings‿, 52 (75.4%) showed "grade II abnormal colposcopic findings‿ and the remaining 3 women (4.3%) had a "suspicious for invasion‿ colposcopy. The histopathological diagnosis showed 2 negative biopsies, 12 (17.4%) cases of CIN1, 50 (72.5%) cases of CIN2 and 5 (7.2%) cases of invasive cervical cancer. We found a colposcopic overestimation in 10 cases (14.5%), underestimation in 12 cases (17.4%), and a concordance in 47 cases (68.1%). A better reliability of colposcopy in women in the firsts two trimesters and in particular in women ≤20 weeks pregnant was found (Cohen's weighted kappa: 0.65).

Conclusions: When performed by gynecologists with expertise, colposcopy is a reliable diagnostic tool, even during pregnancy. Whenever possible, a colposcopic evaluation during the first half of pregnancy is preferable.