High grade squamous intraepithelial lesion (HSIL)
High grade squamous intraepithelial lesion (HSIL) is a precancerous disease caused by human papillomavirus (HPV). It is composed of abnormal squamous cells that have been infected and transformed by the virus. There are many types of HPV but most cases of HSIL are caused by the high-risk types 16 and 18. HSIL can involve the …
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