Found this on Wikipedia, you probably already found it...It sounds pretty positive.
High grade squamous intraepithelial lesion (HSIL or HGSIL) indicates moderate or severe cervical intraepithelial neoplasia or carcinoma in situ. It is usually diagnosed following a Pap test. In some cases these lesions can lead to invasive cervical cancer, if not followed appropriately.
HSIL does not mean that cancer is present. Of all women with HSIL results, 2%[7] or less[8] have invasive cervical cancer at that time, however about 20% would progress to having invasive cervical cancer without treatment.[9] To combat this progression, HSIL is usually followed by an immediate colposcopy with biopsy to sample or remove the dysplastic tissue. This tissue is sent for pathology testing to assign a histologic classification that is more definitive than a Pap smear result (which is a cytologic finding). HSIL generally corresponds to the histological classification of CIN 2 or 3.
HSIL treatment involves the removal or destruction of the affected cells, usually by LEEP. Other methods include cryotherapy, cautery, or laser ablation, but none are performed on pregnant women for fear of disrupting the pregnancy.[10] Any of these procedures is 85% likely to cure the problem.
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