Intraepithelial neoplasia

High-grade anal intraepithelial neoplasia

Progression of pancreatic intraepithelial neoplasia

Histopathology of CIN 3

Intraepithelial neoplasia is a precancerous condition that occurs when abnormal cells are found in the tissue that lines certain parts of the body. These areas include the cervix, vagina, vulva, anus, mouth, esophagus, lung, stomach, pancreas, breast, prostate, and skin. The abnormal cells are not cancer, but can become cancer. Intraepithelial neoplasia is usually caused by a virus such as human papillomavirus (HPV) or human immunodeficiency virus (HIV).

Types of Intraepithelial Neoplasia

There are several types of intraepithelial neoplasia, including:

• Cervical intraepithelial neoplasia (CIN): This is a condition in which abnormal cells grow on the surface of the cervix. CIN is usually caused by HPV and is often found in women who have had an abnormal Pap test.

• Vaginal intraepithelial neoplasia (VAIN): This is a condition in which abnormal cells grow in the lining of the vagina. VAIN is often caused by HPV.

• Vulvar intraepithelial neoplasia (VIN): This is a condition in which abnormal cells grow on the surface of the vulva. VIN is often caused by HPV.

• Anal intraepithelial neoplasia (AIN): This is a condition in which abnormal cells grow in the lining of the anus. AIN is often caused by HPV.

Diagnosis

Intraepithelial neoplasia is usually diagnosed through a biopsy, in which a small sample of tissue is removed and examined under a microscope. The biopsy can show whether the cells are normal, precancerous, or cancerous.

Treatment

The treatment for intraepithelial neoplasia depends on the type and severity of the condition. Treatment options may include surgery, laser therapy, cryotherapy, or chemotherapy. In some cases, no treatment is needed, but the condition is monitored closely to see if it progresses.

Prevention

Prevention of intraepithelial neoplasia includes regular screenings, such as Pap tests for women, and vaccination against HPV.