Host: Thomas C. Wright, Jr., MD
A study of HPV typing for the management of HPV-positive ASC-US cervical cytologic results. Schiffman M, Vaughan LM, Raine-Bennett TR, Castle PE, Katki HA, Gage JC, Fetterman B, Befano B, Wentzensen N. Gynecol Oncol. 2015 Sep;138(3):573-8. doi: 10.1016/j.ygyno.2015.06.040. Epub 2015 Jul 4. Abstract BACKGROUND: In US cervical screening, immediate colposcopy is recommended for women with HPV-positive ASC-US(equivocal) cytology. We evaluated whether partial typing by Onclarity™ (BD) might identify HPV-positive women with low enough CIN3+ risk to permit 1-year follow-up instead. METHODS: The NCI-Kaiser Permanente Northern California Persistence and Progression cohort includes a subset of 13,890 women aged 21+ with HC2 (Qiagen)-positive ASC-US at enrollment; current median follow-up is 3.0years. Using stratified random sampling, we typed 2079 archived enrollment specimens including 329 women subsequently diagnosed with CIN3+, 563 with CIN2, and 1187 with <CIN2. Adjusting for sampling, we computed 3-year cumulative CIN3+ risks for each Onclarity typing channel, using Kaplan-Meier methods. RESULTS: The 3-year CIN3+ risk for all HC2-positive women with ASC-US was 5.2%; this establishes the "benchmark" risk for colposcopic referral. Hierarchically, 3-year cumulative risks for each typing channel were 16.0% for HPV16, 7.4% for HPV18, 7.0% for HPV31, 7.1% for grouped HPV33/58, 4.3% for HPV52, 3.9% for HPV45, 2.7% ...