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Visualization techniques (colposcopy, direct visual inspection, and spectroscopic and other visual methods). Summary of task force 7.

Visual screening techniques include both low-technology approaches, such as direct visual inspection (DVI), and high-technology approaches, such as those that utilize electrooptical detectors to identify cervical cancer precursors and invasive cervical cancer. Simple visual screening techniques, such as DVI, consist of washing the cervix with a solution of 5% acetic acid (e.g., vinegar) and then inspecting it using either the naked eye or with a low-power magnifying device to identify areas of acetowhitening, which frequently correspond to cervical squamous intraepithelial lesions (SILs). The simple visual screening methods are being evaluated as an alternative to cytology in low-resource settings where screening using cervical cytology is not feasible. Multiple studies have shown DVI to have sensitivity similar to that of cervical cytology for identifying women with high grade SIL but much lower specificity. The novel high-technology visual screening methods that utilize electrooptical sensors to identify cervical abnormalities are still in the developmental phases but offer considerable potential.

Acetic Acid↗