Is CIN1 a precancerous lesion of the cervix?
Mar 20, 2025
Source: Cainiu Health
Dr. Qi Zhirong
Introduction
In general, CIN1 refers to the first grade of cervical intraepithelial neoplasia. Cervical intraepithelial neoplasia grade 1 represents a mild form of precancerous lesion of the cervix. The occurrence of cervical intraepithelial neoplasia grade 1 is primarily caused by human papillomavirus (HPV) infection, a widespread virus primarily transmitted through sexual contact.
Generally speaking, CIN1 refers to the first grade of cervical intraepithelial neoplasia. Cervical intraepithelial neoplasia grade 1 represents a mild form of precancerous lesion of the cervix. Detailed analysis is as follows:
Cervical intraepithelial neoplasia is a lesion closely associated with cervical cancer and invasive cervical cancer, reflecting the continuous process of cervical cancer occurrence and progression. It is generally classified into three grades: CIN I, CIN II, and CIN III. Cervical intraepithelial neoplasia grade 1, also known as mild dysplasia, is a type of precancerous lesion but with a relatively low severity.
The occurrence of cervical intraepithelial neoplasia grade 1 is mainly caused by human papillomavirus (HPV) infection, a widespread virus primarily transmitted through sexual contact. Additionally, factors such as long-term multiple sexual partners, early sexual activity, and poor hygiene may increase the risk of high-risk HPV infection, thereby increasing the likelihood of developing cervical intraepithelial neoplasia grade 1. Although patients with cervical intraepithelial neoplasia grade 1 usually do not exhibit obvious symptoms, some may experience non-specific symptoms such as increased vaginal discharge, blood-tinged discharge, or contact bleeding.
In daily life, maintaining sexual hygiene, using condoms, and reducing the number of sexual partners can help lower the risk of HPV infection.
