What are the classifications of cervical dysplasia?

What are the classifications of cervical dysplasia?

Cervical dysplasia was once classified as mild, moderate or severe, based on how likely abnormal cells would become cancerous. A more recent system classifies disease severity based on how much epithelial tissue in your cervix has abnormal cells. Cervical intraepithelial neoplasia (CIN) is classified on a scale from one to three.

• CIN 1: Refers to abnormal cells affecting about one-third of the thickness of the epithelium.
• CIN 2: Refers to abnormal cells affecting about one-third to two-thirds of the epithelium.
• CIN 3: Refers to abnormal cells affecting more than two-thirds of the epithelium.

CIN 1 cervical dysplasia rarely becomes cancer and often goes away on its own. CIN 2 and 3 are more likely to require treatment to prevent cancer.