## Cervical Cancer Screening Algorithm for ASCUS **Key Point:** ASCUS is the most common abnormal Pap smear result (5–10% of all smears) and requires triage to distinguish between benign and malignant lesions. ### Management of ASCUS: Evidence-Based Approach **High-Yield:** HPV DNA testing is the preferred triage method for ASCUS because: - HPV positivity correlates strongly with underlying cervical intraepithelial neoplasia (CIN) 2/3 or cancer - HPV-negative ASCUS has <5% risk of CIN 2/3 and can be managed conservatively - HPV-positive ASCUS warrants colposcopy to rule out high-grade lesions - More cost-effective and clinically efficient than repeat cytology ### Comparison of Triage Strategies for ASCUS | Strategy | Sensitivity | Specificity | Clinical Use | |----------|-------------|-------------|---------------| | HPV DNA testing | 95–100% | 50–60% | **Gold standard triage** | | Repeat Pap smear | 60–70% | High | Alternative if HPV unavailable | | Immediate colposcopy | 100% | Low | Overtreatment risk | | LEEP | N/A | N/A | Therapeutic, not diagnostic | **Clinical Pearl:** HPV testing identifies the ~30% of ASCUS cases with oncogenic HPV types; these patients proceed to colposcopy. The ~70% who are HPV-negative can safely return to routine screening, avoiding unnecessary colposcopy. **Mnemonic:** ASCUS → **A**lways **S**creen with **C**ervical **U**ndetermined **S**equences (HPV DNA) — this triage reduces colposcopy overuse while maintaining safety. [cite:Park 26e Ch 10]
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