CIN
Also written as: CIN — cervical intraepithelial neoplasia
Cervical intraepithelial neoplasia, precancerous changes in cervical cells graded from CIN 1 to CIN 3.
Full Definition
Cervical intraepithelial neoplasia (CIN) is a grading system for precancerous changes in the cervical epithelium, typically caused by persistent high-risk HPV infection. The classification includes CIN 1 (mild dysplasia affecting the lower third of the epithelium), CIN 2 (moderate dysplasia affecting two-thirds of the epithelium), and CIN 3 (severe dysplasia or carcinoma in situ affecting the full thickness of the epithelium). CIN 1 often regresses spontaneously, while CIN 2 and CIN 3 have higher risks of progression to invasive cervical cancer if left untreated. Treatment options vary based on the grade and may include observation, ablative therapies, or excisional procedures.
Usage
Usage note: Always include the grade (1, 2, or 3) when referring to CIN in clinical documentation.
In Context
- "Biopsy results confirmed CIN 2 with recommendation for immediate treatment." — Pathology report
- "The patient's CIN 1 lesion was managed with observation and repeat cytology in six months." — Management plan