Vulvar intraepithelial neoplasia (VIN) is a general term for noncancerous but abnormal changes in the squamous cells that cover the surface of the vulva. The word “intraepithelial” means that the abnormal cells are confined to the top layer of the vulvar skin (the epidermis) and have not grown into the deeper tissue. VIN is not …
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Low grade squamous intraepithelial lesion (LSIL) in the anal canal and anus is an abnormal growth caused by infection with human papillomavirus (HPV). The abnormal growth seen in LSIL is an example of dysplasia. Although the overall risk is low, LSIL is considered a precancerous condition because it can turn into a type of anal cancer …
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Anal intraepithelial neoplasia (AIN) is a precancerous condition that affects the cells lining the anus and anal canal. In this condition, the surface cells show abnormal changes, but they have not spread into deeper tissues, which means it is not cancer. However, some cases can progress over time to squamous cell carcinoma of the anus. …
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In a pathology report, the term non-invasive means that a tumour or abnormal growth has not spread into the surrounding tissues. The abnormal cells are confined to the original layer of tissue where they started. This term is most often used to describe early-stage cancers or pre-cancerous conditions, but it also applies to all benign …
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Gastric dysplasia (also called glandular intraepithelial neoplasia) is a precancerous change that affects the inner lining of the stomach. In gastric dysplasia, the cells that normally cover the stomach wall begin to look and behave abnormally, but they have not yet spread into deeper layers of the stomach. Gastric dysplasia can remain stable for years, …
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What is squamous dysplasia? Squamous dysplasia is a precancerous change involving an area of the body covered by squamous cells. If left untreated, squamous dysplasia can turn into a type of cancer called squamous cell carcinoma over time. What causes squamous dysplasia? The cause of squamous dysplasia depends on where in the body the disease …
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Adenocarcinoma in situ (AIS) is an early form of cancer that develops from glandular cells — the specialized cells that line organs and produce substances such as mucus or hormones. The phrase “in situ” is Latin for “in its original place,” meaning the abnormal cells are confined to the layer of tissue where they first …
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Adenocarcinoma in situ (AIS) of the cervix is a precancerous condition in which abnormal glandular cells grow in the surface lining of the cervix. These cells look like the cells seen in adenocarcinoma, a type of cervical cancer, but in AIS, the abnormal cells have not grown into the deeper layers of the cervical wall. …
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High grade dysplasia of the larynx is a precancerous change in the lining of the voice box. Dysplasia means the squamous cells lining the larynx look abnormal under the microscope and are not maturing normally. “High grade” means those changes are marked and involve much of the thickness of the lining. High grade dysplasia is …
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Endometrioid intraepithelial neoplasia (EIN) is a precancerous condition that affects the lining of the uterus, called the endometrium. In this condition, the glands that make up the endometrium become abnormal in both number and appearance, causing the tissue to become thicker than normal. It is called a precancerous condition because over time, EIN can develop …
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