cervical intraepithelial neoplasia
Precancerous changes in cervical epithelial cells graded as CIN 1, CIN 2, or CIN 3 based on severity.
Full Definition
Cervical intraepithelial neoplasia (CIN) is a grading system for precancerous changes in the cervical epithelium based on the extent of cellular abnormalities observed microscopically. CIN 1 represents mild dysplasia affecting the lower third of the epithelium, CIN 2 indicates moderate dysplasia involving up to two-thirds of the epithelial thickness, and CIN 3 denotes severe dysplasia or carcinoma in situ affecting more than two-thirds of the epithelium. This histopathological classification system helps guide management decisions, with higher grades requiring more aggressive treatment. CIN lesions are strongly associated with human papillomavirus infection and may progress to invasive cervical cancer if left untreated.
Usage
Usage note: Use CIN grading (1, 2, 3) consistently. Distinguish from SIL terminology.
In Context
- "Biopsy results confirmed CIN 3 requiring immediate treatment with LEEP procedure." — Clinical consultation note
- "The patient's CIN 1 lesion will be monitored with serial cytology and HPV testing." — Management plan