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Clinical Use of HPV DNA Testing Thomas C. Wright, Jr. College of Physicians and Surgeons of Columbia University
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Clinical Uses of HPV Testing Spectrum of HPV associated disease Clinical uses of HPV DNA testing Topics to be covered:
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Anogenital HPV Infections Latent infection - no identifiable lesion Exophytic condylomas Low-grade and high-grade neoplasia Invasive cancers Cervix, vulva, anus, penis, head & neck, esophagus, conjunctiva Spectrum of clinical expression
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Clinical Spectrum of Genital Infections Latent Infection Genital Warts
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Clinical Spectrum of Genital Infections CIN 2,3 Invasive Cancer
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Anogenital HPV Types High-risk types16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68, 73, 82 Possible high-risk23, 53, 66, Low-risk types6, 11, 40, 42, 43, 44, 54, 61, 70, 72, 81 Munoz et al. (2003) NEJM
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Wright and Schiffman (2003) NEJM Natural History of HPV Infections
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Clinical Uses of HPV Testing Spectrum of HPV associated disease Clinical uses of HPV DNA testing Topics to be covered:
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HPV DNA Testing Management of ASC - US Secondary follow-up - abnormal Pap Follow-up post treatment Primary screening Potential clinical uses:
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Atypical Squamous Cells - Undetermined Significance (ASC - US)
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HPV Testing for Detecting CIN 2,3 in ASC Wright*1440.7854%0.6763% Manos*9950.8940%0.7639% Bergeron1110.8343%0.6732% Lin741.0053%-- -- Shlay2000.9331%-- -- Solomon*23240.9656%0.8558% HPV Testing Cytology Author No. Pts Sens Refer Sens. Refer *from liquid cytology
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2001 Consensus Guidelines All three standard modalities are considered safe and effective (A I) Because of costs, and patient convenience, "reflex" HPV testing is preferred if liquid- based cytology or co-collection available (A I) Management of ASC-US:
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Management of ASC-US About 2.5 million ASC-US per year in U.S. 70% - 80% of these are liquid-based cytology specimens 70% - 80% of these get "reflex" HPV DNA testing and growing Status as of January 2004:
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HPV DNA Testing Management of ASC - US Secondary follow-up - abnormal Pap Follow-up post treatment of CIN 2,3 Potential clinical uses:
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HPV DNA Testing Management of ASC - US Secondary follow-up - abnormal Pap Follow-up post treatment Primary screening Potential clinical uses:
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HPV Testing for Screening Who gets screened Testing method and with or without Pap Screening frequency Management of screen positives and negatives Questions to address:
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Prevalence of HR HPV DNA Netherlands ^ 13%10%2%2% Costa Rica ^ 10% 6%3%3% Newfoundland * 17%12% 5% 4% UK *^ 3%3%5% France * 21%20%13%11% % HPV (+) by Age Country < 25 25-34 35-44 45+ * all women, women without SIL, ^ by PCR, by HC II
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HPV by PCR CIN3 + 0 % 5 % 10 % 15 % 20 % 25 % 18- 19 20- 24 25- 29 30- 34 25- 29 20- 24 18- 19 35- 50 30- 34 35- 50 Kulasingham SL et al JAMA 2002;288:1749-57. Age-specific Prevalence of HPV and CIN 3 + in Planned Parenthood Study
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HPV Testing for Screening Women 30 years and older FDA approval ACOG Practice Bulletin ACS Guidelines & NCI Workshop May change with increased data Age to initiate testing:
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Primary Screening - Sensitivity: CIN 3+ StudyNo. Pap HPV Combo Portland10,03152 71 81 U.K.9,76190 94 98 Mexico6,11558 95 97 Costa Rica6,17682 94 97 South Africa2,92584 90 93 China1,93698100100 Baltimore1,04050100100 Germany7,59252 96100
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Primary Screening - Specificity: CIN 3+ StudyNo. Pap HPV Combo Portland10,03198 92 91 U.K.9,76197 97 96 Mexico6,11599 94 93 Costa Rica6,17694 94 90 South Africa2,92586 80 76 China1,93676 83 68 Baltimore1,04098 96 96 Germany7,59299 96 95
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HPV Testing for Screening Negativity for high-risk HPV identifies which women are at very low risk for having or developing CIN 2,3 over next 3 yrs Allows targeted screening Key advantage of using:
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Predictive Value of HPV 20,817 women with adequate cytology at enrollment (1994-1996) Tested frozen CVL samples with HC II Follow-up was with cytology and "standard workup" of abnormals NCI - Kaiser Portland, OR cohort: Sherman (2003) JNCI
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Development of CIN 3 on Follow-up HPV + Pap & HPV Neg
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HPV Testing for Screening NCI, ASCCP, and ACS sponsored an experts' workshop to develop guidance for using HPV for screening. Meeting held February 2003 Interim Guidance: Wright et al. Obst. Gynecol. (2004)
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NCI - ASCCP Interim Guidance HPV DNA as an Adjunct to Cytology HPV (-) ASC-US Both Negative Colposcopy Pap > LSIL Repeat Pap & HPV in 3 yrs in 12 mos HPV (+) ASC-US Results of HPV and Cytology
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HPV Testing for Screening Will definitely produce some level of anxiety in almost all patients Concern was that clinicians would immediately perform colposcopy to rule out high-grade neoplasia Very expensive - overload the system Key issue is HPV (+) / Cytology (-)
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Patient's comments when told about availability of HPV DNA testing for screening "Why the hell am I having a Pap smear every year if its not really finding out what we really need to find out? I would be really upset." Anhang et al. (2004) Cancer
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Screening is all about risk. So what's the risk?
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HPV (+) and Cytology (-) Clavel - France: 4.2% Cuzick - England: 2.8% Wright - South Africa:7.8% Risk for CIN 2+ at 6 mos:
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HPV (+) and Cytology (-) Clavel - France: 10 of 10 CIN 2+ Cuzick - England: 9 of 9 CIN 2+ Wright - South Africa:13 of 14 CIN 2+ Repeat HPV (+) @ 6 mos:
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HPV (+) and Cytology (-) Clavel - France: 40% Cuzick - England: 55% Wright - South Africa:60% Rates of HPV persistence - 6 mos:
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Negative Cytology - HPV DNA Positive Repeat both Pap & HPV In 6 to 12 mos HPV (-) ASC-US High-risk HPV (+) Colposcopy Both Negative Pap > LSIL Repeat Pap & HPV in 12 mo. in 3 yrs
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Clinical Uses of HPV Testing Spectrum of HPV associated disease Clinical uses of HPV DNA testing Topics to be covered:
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