Follow the evidence
Several trials in Europe and Canada provide supporting evidence for primary HPV testing, and many European countries have moved to primary HPV testing as their preferred screening method.10,11 The new ACS guidelines put us more in sync with the rest of the world, where HPV testing is the dominant strategy.
It is true that doing additional tests will find more disease; cotesting has been shown to very minimally increase detection of cervical intraepithelial neoplasia grade 2/3 (CIN 2/3) compared with HPV testing alone, but it incurs many more costs and procedures.12 The vast majority of cervical cancer is HPV positive, and cytology still can be used as a triage to primary HPV screening until tests with better sensitivity and/or specificity (such as dual stain and methylation) can be employed to reduce unnecessary “false-positive” driven procedures.
As mentioned, many strong forces are trying to keep cotesting as the preferred strategy. It is important for clinicians to recognize the corporate investment into screening platforms, relationships, and products that underlie some of these efforts so as not to be unfairly influenced by their lobbying. Data from well-conducted, high-quality studies should be the evidence on which one bases a cervical cancer screening strategy.
Innovation catalyzes change
We acknowledge that it is difficult to give up something you have been doing for decades, so there is natural resistance by both patients and clinicians to move the Pap smear into a secondary role. But the data support primary HPV testing as the best screening option from a public health perspective.
At some point, hopefully soon, primary HPV testing will receive approval for self-sampling; this has the potential to reach patients in rural or remote locations who may otherwise not get screened for cervical cancer.13
The 2019 risk-based management guidelines from the ASCCP (American Society for Colposcopy and Cervical Pathology) also incorporate the use of HPV-based screening and surveillance after abnormal tests or colposcopy. Therefore, switching to primary HPV screening will not impact your ability to follow patients appropriately based on clinical guidelines.
Our advice to clinicians is to switch to primary HPV screening now if possible. If that is not feasible, continue your current strategy until you can make the change. And, of course, we recommend that you implement an HPV vaccination program in your practice to maximize primary prevention of HPV-related cancers. ●