Cervical intraepithelial neoplasia

• Pre-invasive stage of cervical cancer
• Dysplasia of squamous cells which occurs at the transformation zone
• Detectable by cervical screening

Cervical glandular intraepithelial neoplasia (CGIN)

• Origin from endocervical epithelium
• Pre-invasive phase of endocervical adenocarcinoma
• More difficult to diagnose on cervical smear than CIN, screening less effective