A 35-year-old woman from rural India presents to the gynaecology clinic for routine cervical cancer screening. She is married, has 3 children, and reports no abnormal vaginal discharge or bleeding. On speculum examination, the cervix appears normal. Pap smear is performed and the report shows 'Atypical Squamous Cells of Undetermined Significance (ASC-US)'. She is HPV-negative on reflex testing. What is the most appropriate next step in management?

Explanation

## Management of ASC-US with Negative HPV Reflex Testing **Key Point:** ASC-US with negative HPV reflex testing carries very low risk of underlying cervical intraepithelial neoplasia (CIN) or malignancy and does NOT warrant colposcopy. **High-Yield:** The 2012 ASCCP (American Society for Colposcopy and Cervical Pathology) guidelines recommend that ASC-US with negative HPV testing be managed with routine screening at 3 years or return to normal screening intervals, depending on the screening protocol used in the region. ### Cytology-HPV Reflex Algorithm | Cytology Result | HPV Status | Management | |---|---|---| | ASC-US | HPV-positive | Colposcopy | | ASC-US | HPV-negative | Repeat cytology at 12 months OR routine screening | | LSIL | HPV-positive | Colposcopy | | LSIL | HPV-negative | Routine screening | | HSIL | Any | Colposcopy (regardless of HPV) | **Clinical Pearl:** HPV-negative ASC-US has a risk of CIN 2+ of only 0.3–0.5%, which is lower than the general population risk. These patients can safely return to routine screening. **Reasoning:** In this case, the patient has ASC-US cytology with negative HPV reflex testing. This combination indicates very low risk of significant pathology. Repeat cytology at 12 months is the standard recommendation to ensure no progression and to confirm the benign nature of the initial finding. Colposcopy would be over-investigation in a HPV-negative woman, and hysterectomy is inappropriate for a screening abnormality in a woman with no cervical pathology. [cite:ASCCP 2012 Cervical Cancer Screening Guidelines]