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P16INK4a as an adjunct marker in liquid-based cervical cytology
Shaira Sahebali1, Christophe E Depuydt, Kurt Segers
1Department of Pathology, University of Antwerp, Wilrijkstraat 10, B-2650 Antwerp (Edegem), Belgium.
International Journal of Cancer
|January 9, 2004
Summary
p16(INK4a) immunocytochemistry shows high accuracy in detecting cervical lesions, improving upon standard screening methods. This biomarker aids in distinguishing high-grade squamous intraepithelial lesions (HSIL) and atypical squamous cells-high grade (ASC-H) from other conditions, enhancing cervical cancer screening.
Area of Science:
- Oncology
- Pathology
- Biomarker Research
Background:
- Cervical cancer screening faces challenges with high false negative rates and inter-observer variability.
- Liquid-based cytology (LBC) is a common screening method, but its accuracy can be improved.
Purpose of the Study:
- To evaluate the potential of p16(INK4a) as a biomarker for cervical lesions.
- To assess the diagnostic accuracy of p16(INK4a) immunocytochemistry in conjunction with LBC.
Main Methods:
- A study of 291 patients undergoing routine cervical screening.
- Analysis included LBC, HPV DNA testing (MY09/MY11 PCR, type-specific PCRs), and p16(INK4a) immunocytochemistry.
- Quantification of p16(INK4a) immunoreactive cells per 1,000 cells.
Main Results:
- Significantly higher p16(INK4a) expression in HSIL and ASC-H compared to lower-grade lesions and negative samples.
- p16(INK4a) mean counts were higher in HPV16 positive and other high-risk HPV type infections.
- Receiver-operating characteristic curves showed high diagnostic accuracy (AUC up to 0.95 for HSIL).
Conclusions:
- p16(INK4a) immunocytochemistry is a valuable adjunct to LBC for cervical cancer screening.
- It demonstrates good diagnostic accuracy in discriminating HSIL and ASC-H from other lesions.
- p16(INK4a) can serve as a surrogate marker for high-risk Human Papillomavirus (HPV) infections.