Skip Navigation LinksHome > July 2010 - Volume 14 - Issue 3 > Enhancing Colposcopy With Polarized Light
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Journal of Lower Genital Tract Disease:
doi: 10.1097/LGT.0b013e3181d52f59
Original Articles

Enhancing Colposcopy With Polarized Light

Ferris, Daron G. MD1; Li, Wenjing PhD2; Gustafsson, Ulf PhD2; Lieberman, Richard W. MD3; Galdos, Oscar MD4; Santos, Carlos MD4

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Abstract

Objective. To determine the potential utility of polarized light used during colposcopic examinations.

Materials and Methods. Matched, polarized, and unpolarized colposcopic images and diagnostic annotations from 31 subjects receiving excisional treatment of cervical neoplasia were compared. Sensitivity, specificity, and mean Euclidean distances between the centroids of the gaussian ellipsoids for the different epithelial types were calculated for unpolarized and polarized images.

Results. The sensitivities of polarized colposcopic annotations for discriminating cervical intraepithelial neoplasia (CIN) 2 or higher were greater for all 3 acetowhite categories when compared with unpolarized annotations (58% [44/76] vs 45% [34/76], 68% [50/74] vs 59% [45/76], and 68% [49/72] vs 66% [50/76], respectively). The average percent differences in Euclidean distances between the epithelial types for unpolarized and polarized cervical images were as follows: CIN 2/3 versus CIN 1 = 33% (10/30, p =.03), CIN 2/3 versus columnar epithelium = 22% (p =.004), CIN 2/3 versus immature metaplasia = 29% (14/47, p =.11), and CIN 1 versus immature metaplasia = 27% (4.4/16, p =.16).

Conclusions. Because of its ability to interrogate at a deeper plane and eliminate obscuring glare, polarized light colposcopy may enhance the evaluation and detection of cervical neoplasias.

©2010The American Society for Colposcopy and Cervical Pathology

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