NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,041 terms related to cancer and medicine.

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high-grade squamous intraepithelial lesion
(... SKWAY-mus IN-truh-eh-pih-THEE-lee-ul LEE-zhun)
A growth on the surface of the cervix with moderately or severely abnormal cells. High-grade squamous intraepithelial lesions are usually caused by certain types of human papillomavirus (HPV) and are found when a Pap test is done. If not treated, these abnormal cells may become cancer and spread to nearby normal tissue. A high-grade squamous intraepithelial lesion is sometimes called moderate or severe dysplasia. Also called HSIL.