HPV testing could be future strategy for primary screening for cervical cancerDecember 04, 2003
Authors of a UK study in this week's issue of THE LANCET propose a new approach for cervical cancer screening. Testing for the human papilloma virus (HPV)-the main cause of cervical cancer-could be the primary screening tool, with cytology reserved for women who test positive for HPV.
HPV testing (by genetic analysis) of cervical smears is known to be more sensitive than conventional cytology for detecting pre-malignant cervical cells called high-grade cervical intraepithelial neoplasia (CIN2/CIN3); however HPV testing is less specific than cytology (ie. it produces more 'false-positive' results). HPV testing as a primary screening approach is only feasible if appropriate management is given to women who are HPV-positive with negative or borderline cytology results.
The HART (HPV in Addition to Routine Testing) study was led by Jack Cuzick and colleagues from Cancer Research UK. Around 11,000 women aged 30-60 years from 161 GP practices in 5 UK regions participated in the study between 1998 and 2001. Women with borderline cytology and women positive for high-risk HPV with negative cytology were randomised to immediate colposcopy (detailed examination of the cervix) or to surveillance by repeat HPV testing, cytology, and colposcopy at 12 months.
HPV testing was more sensitive than borderline or worse cytology (97% compared with 77%) but slightly less specific (93% compared with 96%) for detecting malignant cells. Surveillance at 12 months was as effective as immediate colposcopy for women with minimal abnormalities, i.e., those women with either borderline cytology results (regardless of HPV status) or who were HPV positive but had negative cytology results.
Jack Cuzick comments: "HPV testing could be used for primary screening in women older than 30 years, with cytology used to triage HPV-positive women. HPV-positive women with normal or borderline cytology (about 6% of screened women) could be managed by repeat testing after 12 months. This approach could potentially improve detection rates of CIN2/CIN3 without increasing the colposcopy referral rate."
In an accompanying Commentary (p 1866), Eduardo Franco from McGill University, Montreal, Canada, concludes: "The HART trial can be viewed as a launching pad for future randomised trials that will assess the duration of protection conferred by a negative HPV result and the efficacy of a Pap-centered triage approach. A paradigm change, if necessary, will represent far more than a technicality. It will mean that cervical cancer screening will shift from a morphology-based approach to one in which the search for a sexually transmitted virus becomes the focus of disease detection. Clients and providers will have to learn to live with the new paradigm, one which places the emphasis of prevention not only on women but on their partners as well. It is about time."
Cancer Research UK Press Office
Professor Eduardo L Franco
Departments of Epidemiology and Oncology
Montreal, Quebec H2W1S6, Canada
Issue 6 December 2003
Lancet 2003; 362: 1866, 1871-76
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A new review looks at cervical cancer screening in the era of HPV vaccination.
Duke University researchers have developed a handheld device for cervical cancer screening that promises to do away with uncomfortable speculums and high-cost colposcopes.
While current guidelines indicate that cervical cancer screening can be stopped for average risk patients after age 65, many women lack the appropriate amount of screening history to accurately assess their risk.
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A new study from the University of Illinois confirms a link between Pap smear screenings and a lower risk of developing cervical cancer in women over age 65.
Lupus confirmed as risk factor for cervical cancer
Cervical cancer is an 'enormous burden' for Latin-American society, and the third leading cause of cancer deaths among women in the region, say Dr.
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