High grade squamous intraepithelial lesion of the anal canal
What is a high grade squamous intraepithelial lesion of the anal canal? High grade squamous intraepithelial lesion (HSIL) is a pre-cancerous disease that starts from specialized squamous cells that cover the inside of the anal canal. HSIL is called a pre-cancerous disease because over time it can turn into a type of cancer called squamous cell …
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