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Vasavada A, Stankiewicz Karita HC, Lin J, Schouten J, Hawes SE, Barnabas RV, Wasserheit J, Feng Q, Winer RL. Methylation markers for anal cancer screening: A repeated cross-sectional analysis of people living with HIV, 2015-2016. Int J Cancer 2024; 155:1091-1100. [PMID: 38680109 PMCID: PMC11250920 DOI: 10.1002/ijc.34977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 03/11/2024] [Accepted: 03/22/2024] [Indexed: 05/01/2024]
Abstract
People living with HIV (PLWH) are at highest risk of anal cancer and will benefit from optimized screening for early disease detection. We compared host DNA methylation markers in high-grade squamous intraepithelial lesions (HSIL) versus samples negative for intraepithelial lesions (NILM) or low-grade intraepithelial lesions (LSIL) in PLWH. We recruited PLWH identifying as male aged ≥18 years undergoing high-resolution anoscopy (HRA) in Seattle, Washington, 2015-2016. Anal brush samples were collected for HPV detection, genotyping, and pyrosequencing methylation (host genes ASCL1, PAX1, FMN2, and ATP10A); clinical data were abstracted from medical records. We assessed associations between methylation and presence and extent of HSIL using generalized estimating equation logistic regression, adjusting for age, CD4 count and HIV viral load. Marker panels using HPV DNA and methylation were also evaluated to predict prevalent HSIL. We analyzed 125 samples from 85 participants (mean age 50.1; standard deviation 11.0 years). ASCL1 (adjusted odds ratio [aOR] per 1 unit increase mean percent methylation: 1.07, 95% CI: 1.01-1.13) and FMN2 (aOR per 1 unit increase mean percent methylation: 1.14, 95% CI: 1.08-1.20) methylation were significantly associated with HSIL versus NILM/LSIL. ASCL1 (aOR: 1.06, 95% CI: 1.01-1.11) and FMN2 (aOR: 1.13, 95% CI: 1.08-1.17) methylation were positively associated with increasing HSIL extent. A panel combining methylation (ASCL1 and FMN2) and HPV DNA (HPV16, HPV18, and HPV31) demonstrated best balance of sensitivity (78.2%) and specificity (73.9%) for HSIL detection compared with methylation or HPV alone. Increasing levels of DNA methylation of ASCL1 and FMN2 were positively associated with HSIL detection in PLWH. Host gene methylation testing shows promise for HSIL screening and triage.
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Affiliation(s)
- Anjali Vasavada
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, USA
| | - Helen C Stankiewicz Karita
- Division of Allergy and Infectious Diseases, University of Washington School of Medicine, Seattle, Washington, USA
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA
| | - John Lin
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, USA
| | - Jeffrey Schouten
- Division of Allergy and Infectious Diseases, University of Washington School of Medicine, Seattle, Washington, USA
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA
- Division of General Surgery, University of Washington School of Medicine, Seattle, Washington, USA
- Department of Surgery, University of Washington School of Medicine, Seattle, Washington, USA
| | - Stephen E Hawes
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, USA
- Department of Global Health, University of Washington School of Public Health, Seattle, Washington, USA
| | - Ruanne V Barnabas
- Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Judith Wasserheit
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, USA
- Division of Allergy and Infectious Diseases, University of Washington School of Medicine, Seattle, Washington, USA
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA
- Department of Global Health, University of Washington School of Public Health, Seattle, Washington, USA
| | | | - Rachel L Winer
- Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington, USA
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Smithgall MC, Towne WS, Gonzalez AA, Cimic A. Evaluation of dual p16/Ki-67 immunostaining on anal cytology specimens. Diagn Cytopathol 2024; 52:469-474. [PMID: 38666389 DOI: 10.1002/dc.25332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/27/2024] [Accepted: 04/15/2024] [Indexed: 08/02/2024]
Abstract
INTRODUCTION Dual immunostaining for p16/Ki67 is FDA-approved for use on liquid-based cervical cytology specimens; however, the utility of dual staining in anal cytology especially for ASCUS risk stratification is not well established. METHODS We investigated dual staining performance on anal cytology specimens and correlated with subsequent cytologic interpretation, high-risk HPV status, and anal biopsy results. Dual staining for p16/Ki-67 was performed on all liquid-based anal cytology specimens from December 2021 to June 2022 (n = 43). RESULTS Three patients had high grade squamous intraepithelial lesion (HSIL/AIN2-3) on biopsy; dual staining was positive in all three cases. All HR-HPV negative cases were negative for dual staining. Among the 12 ASCUS samples with subsequent anal biopsy results all also had HR-HPV testing. Due to small sample size of cases with squamous intraepithelial lesion (SIL) diagnosed on biopsy, the sensitivity and positive predictive value was not calculated. However, the specificity and negative predictive value of p16/Ki-67 dual staining for SIL of any grade on biopsy were 1 (95% CI: 0.66-1) and 0.9 (95% CI: 0.65-0.97) respectively, whereas the specificity and negative predictive value of HR-HPV testing for SIL of any grade on biopsy were 0.44 (95% CI: 0.14-0.79) and 0.8 (95% CI: 0.41-0.96) respectively. CONCLUSION Dual p16/Ki-67 staining indicates transforming HPV infection and could help serve as an ancillary test for risk stratification for atypical anal cytology specimens. Among ASCUS samples, dual staining was specific for SIL of any grade with a high negative predictive value and therefore could be useful in clinical practices with limited availability for follow-up care.
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Affiliation(s)
- Marie C Smithgall
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - William S Towne
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - Abel A Gonzalez
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - Adela Cimic
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
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Hernandez AL, Hilton JF, Weatherly CS, Berry-Lawhorn JM, Jay N, Brickman C, Wang CCJ, Kauffman J, Calderon J, Farhat S, Da Costa M, Akha AS, Darragh T, Palefsky JM. Prevalence of Anal Human Papillomavirus Infection and Anal High-Grade Squamous Intraepithelial Lesions Among Men Who Have Sex With Men 50 Years and Older Living With or Without HIV. J Acquir Immune Defic Syndr 2024; 96:439-446. [PMID: 38985441 DOI: 10.1097/qai.0000000000003450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 03/25/2024] [Indexed: 07/11/2024]
Abstract
BACKGROUND Anal cancer is caused by human papillomavirus (HPV), particularly HPV-16, and is preceded by anal high-grade squamous intraepithelial lesions (HSILs). The incidence of anal cancer is highest among men who have sex with men (MSM) living with HIV (MSMLWH) and increases with age. However, most previous studies of anal HPV infection and anal HSIL were performed on men under 50 years old, and relatively little is known about HSIL among older MSMLWH or MSM not living with HIV (MSM-Not-LWH). SETTING We enrolled MSM who were aged 50+ during 2018-2022 in San Francisco, CA. METHODS One hundred twenty-nine MSMLWH and 109 MSM-not-LWH participated. All participants had anal HPV DNA testing (Atila Biosystems) and high-resolution anoscopy with a biopsy of visible lesions. RESULTS Among MSMLWH, 47% had anal HSIL, 19% had HPV-16, and 51% had other oncogenic anal HPV types (excluding HPV-16). Among MSM-not-LWH, 37% had anal HSIL, 22% had HPV-16, and 34% had other oncogenic anal HPV types. Increasing age was not statistically associated with prevalent HSIL, HPV-16, or other oncogenic HPV infections in MSMLWH or MSM-not-LWH. HPV-16 (odds ratio: 45.1, 95% confidence interval: 15.8-129); other oncogenic HPV types (odds ratio: 5.95, 95% confidence interval: 2.74-12.9) were associated with increased odds of anal HSIL, adjusted for age, income, education, and HIV status. CONCLUSION The prevalence of oncogenic anal HPV, anal HPV-16, and anal HSIL remains very high in older MSMLWH and MSM-not-LWH. With recent evidence showing that treating anal HSIL prevents anal cancer, MSM aged 50+ should be considered for anal cancer screening.
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Affiliation(s)
- Alexandra L Hernandez
- Department of Medicine, University of California, San Francisco, CA
- Public Health Program, College of Education and Health Sciences, Touro University, Vallejo, CA
| | - Joan F Hilton
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA
| | | | | | - Naomi Jay
- Department of Medicine, University of California, San Francisco, CA
| | | | - Chia-Ching J Wang
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA
| | - Jason Kauffman
- Department of Medicine, Cedars-Sinai, Beverly Hills, CA; and
| | - Joanne Calderon
- Department of Medicine, University of California, San Francisco, CA
| | - Sepideh Farhat
- Department of Medicine, University of California, San Francisco, CA
| | - Maria Da Costa
- Department of Medicine, University of California, San Francisco, CA
| | | | - Teresa Darragh
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA
- Department of Pathology, University of California, San Francisco, CA
| | - Joel M Palefsky
- Department of Medicine, University of California, San Francisco, CA
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Lu Z, Yixin S, Jianyu C, Xiang T, Long S, Qing C. Anal intraepithelial neoplasia screening in women from the largest center for lower genital tract disease in China. J Med Virol 2024; 96:e29747. [PMID: 38895783 DOI: 10.1002/jmv.29747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 06/03/2024] [Accepted: 06/08/2024] [Indexed: 06/21/2024]
Abstract
This study aimed to provide comprehensive clinical screening data for anal intraepithelial neoplasia (AIN). This study included 312 patients who underwent high-resolution anoscopy (HRA) examinations between January 1, 2020 and April 15, 2024. Clinical data, including demographic information, clinical history, cytology/high-risk human papilloma virus (hrHPV) results, and HRA records, were analyzed. The median age of all patients was 42 years (interquartile range: 33-52 years). Approximately 26.3% reported a history of VIN2/3+, 13.5% had a history of VaIN2/3+, 29.8% had a history of CIN2/3+, 44.6% had persistent cervical HPV16 infection, and 12.5% had immune suppression. Among the 312 patients, 14.4% were diagnosed with AIN2/3, 25.0% with AIN1 and 60.6% were normal. Anal cytological abnormalities were found in 41.3% of all patients, with a significantly higher rate in AIN2/3 patients than in ≤AIN1, 71.1% versus 36.3%, p < 0.001. The hrHPV positivity rate was 89.7%, with HPV16 being the most prevalent. The complete agreement rate for HRA impressions was 79.5%. Multi-variable analysis revealed immune suppression (odds ratio [OR]: 3.47, 95% confidence interval [CI]: 1.42-8.5) and VIN2/3+ (OR: 2.82, 95% CI: 1.27-6.28) were independent risk factors for AIN2/3. Abnormal cytology results (OR: 3.3, 95% CI: 1.52-7.17) and anal HPV16 infection (OR: 3.2, 95% CI: 1.26-8.12) demonstrated similar ORs for AIN2/3. Early screening for AIN2/3+ is crucial in Chinese women with lower genital tract precancerous and cancerous lesions, particularly in those with VIN2/3+ and immune suppression.
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Affiliation(s)
- Zhang Lu
- Cervical Disease Center, Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Sun Yixin
- Cervical Disease Center, Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Chen Jianyu
- Cervical Disease Center, Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Tao Xiang
- Department of Pathology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Sui Long
- Cervical Disease Center, Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Cong Qing
- Cervical Disease Center, Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
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Mutetwa T, Liu Y, Silvera R, Evans M, Yurich M, Tripodi J, Leonard I, Houldsworth J, Gümüş Z, Bowcock AM, Sigel K, Gaisa M, Polak P. Host Nuclear Genome Copy Number Variations Identify High-Risk Anal Precancers in People Living With HIV. J Acquir Immune Defic Syndr 2024; 96:190-195. [PMID: 38630441 PMCID: PMC11108747 DOI: 10.1097/qai.0000000000003409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 12/07/2023] [Indexed: 05/22/2024]
Abstract
BACKGROUND People living with HIV (PLWH) have substantially increased incidence of anal precancer and cancer. There are very little data regarding genomic disturbances in anal precancers among PLWH. In this study, specific chromosomal variants were identified in anal squamous intraepithelial lesions. METHODS Overall, 63 anal biopsy specimens (27 low-grade intraepithelial lesions [LSIL] and 36 high-grade intraepithelial lesions [HSIL]) were collected from PLWH obtained as part of anal cancer screening in our NYC-based health system. Data on patient demographics, anal cytological, and high-risk human papillomavirus (HR-HPV) diagnoses were collected. Specimens were tested for a panel of chromosomal alterations associated with HPV-induced oncogenesis using fluorescence in situ hybridization, and analyses compared the associations of these alterations with clinical characteristics. RESULTS Gains of 3q26, 5p15, 20q13, and cen7 were detected in 42%, 31%, 31%, and 19% of HSIL compared with 7%, 0%, 4%, and 0% of LSIL, respectively. If at least 1 abnormality was observed, 89% had a 3q26 gain. In lesions with 5p15 gains, 20q13 gains co-occurred in 91% of cases, while cen7 gain only co-occurred with the other 3 alterations. The sensitivity and specificity of any alteration to predict HSIL were 47% (95% CI: 30%-65%) and 93% (95% CI: 76%-99%), respectively. CONCLUSIONS Genomic alterations seen in HPV-associated cancers may help distinguish anal LSIL from HSIL. 3q26 amplification may be an early component of anal carcinogenesis, preceding 5p16, 20q13, and/or chr7. IMPACT Insights into potential genomic biomarkers for discriminating high-risk anal precancers are shared.
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Affiliation(s)
- Tinaye Mutetwa
- Division of General Internal Medicine, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Yuxin Liu
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Richard Silvera
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Michelle Evans
- Division of General Internal Medicine, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Michael Yurich
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Joseph Tripodi
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Issa Leonard
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jane Houldsworth
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Zeynep Gümüş
- Department of Genetics and Genomics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Anne M. Bowcock
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Keith Sigel
- Division of General Internal Medicine, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Michael Gaisa
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Paz Polak
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Vohra P, Khorsandi N, Baskota SU. A comprehensive review of anal cancer-with a special focus on anal cytology. J Am Soc Cytopathol 2024; 13:122-140. [PMID: 38097479 DOI: 10.1016/j.jasc.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/23/2023] [Accepted: 11/06/2023] [Indexed: 03/16/2024]
Abstract
The diagnosis of anal cancer is relatively uncommon, but its incidence has been steadily increasing in high-risk populations. In the 2001 Bethesda System for Reporting Cervical Cytology, anal cytology was introduced as a component. Since then, it has been recognized as a potential tool for screening anal cancer, often in conjunction with high-resolution anoscopy. There are notable similarities between anal cancer and cervical cancer, including the causative role of human papillomavirus. However, there are also significant differences, particularly in terms of disease prevalence. Anal cytology may be used as a primary screening test, and in the event of abnormalities, patients are subsequently directed for high-resolution anoscopy. However, the best approach for anal cancer screening is yet to be determined and uniformly implemented. This comprehensive review article provides an in-depth analysis of the epidemiology and incidence of anal precursor and malignant lesions. It explores the various methods of sample procurement, preparation, interpretation (including sensitivity and specificity), and reporting terminology in anal cytology. The article also addresses the significance of concurrent high-risk human papillomavirus screening in anal cytology and its role in screening programs. Furthermore, it discusses the follow-up, prevention, and subsequent management strategies for anal cancers. By synthesizing current knowledge in these areas, this review aims to provide a comprehensive understanding of anal cytology and its implications in the early detection, prevention, and management of anal neoplasia and cancer.
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Affiliation(s)
- Poonam Vohra
- Department of Pathology, University of California, San Francisco, California.
| | - Nikka Khorsandi
- Department of Pathology, University of California, San Francisco, California
| | - Swikrity Upadhyay Baskota
- Department of Pathology and Cell Biology, New York-Presbyterian/Columbia University Irving Medical Center, New York, New York
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Chromy D, Silling S, Wieland U, Kreuter A. [Anogenital warts-An update]. DERMATOLOGIE (HEIDELBERG, GERMANY) 2024; 75:30-39. [PMID: 38108864 DOI: 10.1007/s00105-023-05282-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/05/2023] [Indexed: 12/19/2023]
Abstract
With a prevalence of around 1% in the sexually active population anogenital warts are the most frequent human papillomavirus (HPV)-related disease. In the vast majority of cases the underlying cause of the infection is due to HPV types 6 and 11. The diagnosis can usually be clinically established but in certain cases a histopathological work-up can be useful. Buschke-Lowenstein tumors represent such a scenario. The current therapeutic armamentarium for anogenital warts ranges from surgical ablative procedures up to local immunomodulatory treatment. All procedures have different advantages and disadvantages and are relatively time-consuming and sometimes also unpleasant for the patient. Anogenital warts are also a possible expression of an incomplete immunological control of HPV. Therefore, it should be emphasized that for certain affected individuals, especially immunosuppressed patients, special attention should be given to ensuring that screening investigations for HPV-associated dysplasia is carried out according to the respective valid guidelines. The primary prophylaxis by vaccination of girls and boys prior to first HPV exposure represents a very effective option to drastically reduce the prevalence of anogenital warts and other HPV-related diseases.
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Affiliation(s)
- David Chromy
- Universitätsklinik für Dermatologie, Medizinische Universität Wien, Wien, Österreich.
- Klinik für Dermatologie und Venerologie, Universitätsklinikum Essen, Universität Duisburg-Essen, Essen, Deutschland.
| | - Steffi Silling
- Institut für Virologie, Nationales Referenzzentrum für Papillom- und Polyomaviren, Universitätsklinikum Köln und Universität zu Köln, Köln, Deutschland
| | - Ulrike Wieland
- Institut für Virologie, Nationales Referenzzentrum für Papillom- und Polyomaviren, Universitätsklinikum Köln und Universität zu Köln, Köln, Deutschland
| | - Alexander Kreuter
- Klinik für Dermatologie, Venerologie und Allergologie, Helios St. Elisabeth Klinik Oberhausen, Universität Witten-Herdecke, Oberhausen, Deutschland
- Klinik für Dermatologie, Venerologie und Allergologie, Helios St. Johannes Klinik Duisburg, Duisburg, Deutschland
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Liu Y, Bhardwaj S, Sigel K, Winters J, Terlizzi J, Gaisa MM. Anal cancer screening results from 18-to-34-year-old men who have sex with men living with HIV. Int J Cancer 2024; 154:21-27. [PMID: 37728489 PMCID: PMC10842989 DOI: 10.1002/ijc.34734] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 08/05/2023] [Accepted: 08/28/2023] [Indexed: 09/21/2023]
Abstract
Men who have sex with men living with HIV (MSM LWH) are at highest risk for human papillomavirus (HPV)-associated anal cancer. There is no consensus on the optimal screening initiation age. This study aimed to assess the prevalence and severity of anal HPV disease among MSM LWH under the age of 35, which is a currently proposed screening age threshold. Between 2014 and 2020, 1255 18-to-34-year-old MSM LWH underwent anal cytology screening. 916 were co-tested for high-risk HPV (HR-HPV). 467 underwent high-resolution anoscopy (HRA) and biopsy. Cancer registry data were queried. Predictors of abnormal cytology (ie, ≥ASCUS) and histological high-grade squamous intraepithelial lesions (HSIL) were evaluated using unadjusted logistic regression models. Median age was 28 years (range, 18-34). 19% received at least one dose of HPV vaccine. Abnormal cytology rate was 65%. HR-HPV and HPV16 prevalence were 87% and 30%. Biopsy results were benign (10%), LSIL (43%) and HSIL (47%). No cases of prevalent or incident anal cancers were detected. Findings were similar between age subgroups (18-24, 25-29 and 30-34) except for a higher prevalence of AIN 3 in the 30-34 group (19%). Abnormal cytology was significantly associated with HR-HPV infection. Histological HSIL was associated with HR-HPV infection and cytological LSIL or worse. The absence of anal cancer in a large cohort of MSM LWH under the age of 35, despite high prevalence of anal HR-HPV infection and precancer, supports an age-based anal cancer screening strategy for MSM LWH.
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Affiliation(s)
- Yuxin Liu
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Swati Bhardwaj
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Keith Sigel
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - John Winters
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Joseph Terlizzi
- Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Michael M. Gaisa
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Ramos-Cartagena JM, Keller K, Guiot HM, Muñoz C, Colón-López V, Deshmukh AA, Suárez EL, Tirado-Gómez M, Ortiz AP. Evaluating the performance of anal cytology and high-risk HPV genotyping for detecting anal HSIL in a clinic-based sample of people living with and without HIV in Puerto Rico. Cancer Cytopathol 2023; 131:655-664. [PMID: 37358055 PMCID: PMC10650567 DOI: 10.1002/cncy.22738] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/27/2023]
Abstract
BACKGROUND Given the disproportionately elevated anal cancer risk in high-risk populations, it is important to assess the performance of commonly used anal cancer screening tools to improve the effectiveness of detection and treatment methods. This study evaluates 1) the concordance between anal cytology and histology results and 2) the performance of cytology and high-risk human papillomavirus (HR-HPV) genotyping as screening tools for detecting histologically confirmed anal high-grade squamous intraepithelial lesions (HSIL). METHODS Data from the Anal Neoplasia Clinic in Puerto Rico (2014-2021; n = 466) was used. The clinical performance of anal cytology and HR-HPV genotyping to detect HSIL was compared to the gold standard: high-resolution anoscopy-guided biopsy. Sensitivity, specificity, positive predictive value, negative predictive value, and κ coefficients were calculated. RESULTS A total of 66.95% of the patients were men, 74.0% were people living with HIV, 76.2% had anal HR-HPV infection, and 40.34% had histologically confirmed anal HSIL. The weighted κ statistic between the tests (cytology and histology) was 0.25 (p < .001). The sensitivity and specificity of cytology alone to detect anal HSIL were 84.3% (95% confidence interval [CI], 78.3%-89.1%) and 36.0% (95% CI, 30.3%-42.0%), respectively. Anal HR-HPV genotyping had higher sensitivity (92.2%; 95% CI, 87.4%-95.6%) and similar specificity (34.8%; 95% CI, 29.2%-40.7%) compared to cytology. The two tests combined (positive results following cytology or HR-HPV test) improved sensitivity to detect anal HSIL (97.9%; 95% CI, 94.8%-99.4%), but specificity was compromised (19.2%; 95% CI, 14.7%-24.4%). CONCLUSION Although HR-HPV genotyping improved the detection of anal HSIL, HR-HPV testing had lower specificity than anal cytology alone.
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Affiliation(s)
| | | | - Humberto M. Guiot
- University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico
- School of Medicine, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico
| | - Cristina Muñoz
- University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico
| | - Vivian Colón-López
- University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico
| | - Ashish A. Deshmukh
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, South Carolina
- Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina
| | - Erick L. Suárez
- University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico
| | - Maribel Tirado-Gómez
- University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico
- School of Medicine, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico
| | - Ana Patricia Ortiz
- University of Puerto Rico Comprehensive Cancer Center, San Juan, Puerto Rico
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10
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Macedo AC, Grande AJ, Figueiredo T, Colonetti T, Gonçalves JC, Testoni E, da Rosa MI. DNA high-risk HPV, mRNA HPV and P16 tests for diagnosis of anal cancer and precursor lesions: a systematic review and meta-analysis. EClinicalMedicine 2023; 62:102128. [PMID: 37588624 PMCID: PMC10425667 DOI: 10.1016/j.eclinm.2023.102128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 07/02/2023] [Accepted: 07/17/2023] [Indexed: 08/18/2023] Open
Abstract
Background Anal cancer prevention has two critical points: the incidence rate is several fold higher for some groups, such as people living with human immunodeficiency virus (HIV) and men who have sex with men (MSM), and there is not a well-defined guideline for its screening. This systematic review evaluates the accuracy of DNA HRHPV (high-risk human papillomavirus), mRNA HPV, DNA HPV16 isolated and p16 staining biomarkers in anal canal smears for identifying anal intraepithelial neoplasia (AIN) 2 or 3, summarised as anal high-grade squamous intraepithelial lesions (aHSIL), and cancer. Methods We searched the MEDLINE, Cochrane Library and Embase electronic databases as well as Grey literature to identify eligible papers published up to 31st July 2022. This systematic review and meta-analysis included observational studies comparing biomarker tests to histopathology after HRA (High-resolution Anoscopy) as a reference standard. We (ACM, TF) analysed studies in which patients of both sexes were screened for anal cancer using DNA HRHPV, mRNA HPV, DNA HPV16 and/or p16 biomarkers. The analysis was performed in pairs, for instance AIN2 or worse (AIN2+) vs. AIN1, HPV infection and normal (AIN1-). PROSPERO CRD42015024201. Findings We included 21 studies with 7445 patients. DNA HR HPV showed a higher sensitivity 92.4% (95% CI 84.2-96.5), specificity 41.7% (95% CI 33.9-44.9) and AUC 0.67, followed by the mRNA HPV test, with a sensitivity 77.3% (95% CI 73.2%-80.9%), specificity 61.9% (95% CI 56.6-66.9) and AUC 0.78. DNA HPV16 showed higher specificity 71.7% (95% CI 55.3-83.8), followed by p16 test, 64.1% (95% CI 51.0-75.4); Sensitivity of DNA HPV16 was 53.3% (95% CI 35.4-70.3) and AUC 0.69, while p16 had a sensitivity of 68.8% (95% CI 47.9-84.1) and AUC 0.74. Subgroup analysis of MSM with HIV, with 13 studies and 5123 patients, showed similar accuracy, with a bit higher sensitivities and lower specificities. Considering the measure of the total between-study variability, mRNA HPV tests showed the smallest area of the 95% prediction ellipse, 6.0%, influenced by the low logit sensitivity, 0.011. All other groups of tests exceed 50% prediction ellipse area, which represent a high heterogeneity. Interpretation Our findings suggested that DNA HR HPV can be a useful tool for screening for aHSIL and anal cancer if followed by biomarker with a higher specificity. As an isolated test, mRNA HPV had better performance. Funding There was no funding source for this study.
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Affiliation(s)
- Ana Cristina Macedo
- Laboratory of Translational Medicine, Postgraduate Program in Health Sciences at the University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Antônio José Grande
- Laboratory of Evidence-based Pratice, State University of Mato Grosso do Sul, Campo Grande, MS, Brazil
- Post-graduate Program in Infectious Disease and Parasites, Federal University of Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - Tatiana Figueiredo
- Laboratory of Translational Medicine, Postgraduate Program in Health Sciences at the University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Tamy Colonetti
- Laboratory of Translational Medicine, Postgraduate Program in Health Sciences at the University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - João Carlos Gonçalves
- Laboratory of Translational Medicine, Postgraduate Program in Health Sciences at the University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Eduardo Testoni
- Laboratory of Translational Medicine, Postgraduate Program in Health Sciences at the University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Maria Inês da Rosa
- Laboratory of Translational Medicine, Postgraduate Program in Health Sciences at the University of Extremo Sul Catarinense, Criciúma, SC, Brazil
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Jordan JA, Rivas KI, Aldous A, Connors KA, Jair K, Klein DA, Hoke ES, Abbott SE. Demonstrating a Statistically Significant Association Between Anal High-Grade Squamous Intraepithelial Lesion and Positive OncoE6 Anal Test in Men Who Have Sex With Men and Are Living With HIV. J Low Genit Tract Dis 2023; 27:248-251. [PMID: 37201549 PMCID: PMC10348354 DOI: 10.1097/lgt.0000000000000750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
OBJECTIVES The aim of the study is to determine whether a positive OncoE6 Anal Test result has statistically significant higher odds of being associated with high-grade squamous intraepithelial lesion (HSIL) and to calculate sensitivity and specificity of this test for predicting HSIL in adult men who have sex with men and are living with HIV (MSMLWH). MATERIALS AND METHODS Men living with HIV 18 years or older having ≥atypical squamous cells of undetermined significance-grade anal cytology results were eligible to enroll in this cross-sectional study. Anal samples were collected just before the high-resolution anoscopy procedure. OncoE6 Anal Test results were compared with histology, the reference standard. Sensitivity, specificity, and odds ratio were calculated using HSIL as the threshold. RESULTS Two hundred seventy-seven consented MSMLWH were enrolled between June 2017 and January 2022. Of these, 219 (79.1%) had biopsies obtained and histology performed; 81 of 219 participants (37%) had 1 or more biopsies with HSIL results while the remaining 138 of 219 (63%) had only low-grade squamous intraepithelial lesion or were negative for dysplasia. Anal samples from 7 participants (8.6%, 7/81) with HSIL and 3 (2.2%, 3/138) with low-grade squamous intraepithelial lesion had positive OncoE6 Anal Test results. Odds of having HSIL were 4.26 times higher among participants testing positive for HPV16/HPV18 E6 oncoprotein(s) (OR = 4.26, 95% CI = 1.07-16.95, p = .04). The OncoE6 Anal Test demonstrated excellent specificity, 97.83% (93.78-99.55), but poor sensitivity, 8.64% (3.55-17.0). CONCLUSIONS In this highest-risk population for anal cancer, one could combine the OncoE6 Anal Test, having excellent specificity, with the anal Pap test, having higher sensitivity. Patients found having both an abnormal anal Pap and positive OncoE6 Anal Test result could be triaged for rapid scheduling of their high-resolution anoscopy.
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Affiliation(s)
- Jeanne A. Jordan
- Department of Epidemiology, School of Public Health, The George Washington University, Washington, DC, USA
| | - Karina I. Rivas
- Department of Epidemiology, School of Public Health, The George Washington University, Washington, DC, USA
| | - Annette Aldous
- Department of Biostatistics and Bioinformatics, School of Public Health, The George Washington University, Washington, DC, USA
| | - Kaleigh A. Connors
- Department of Epidemiology, School of Public Health, The George Washington University, Washington, DC, USA
| | - Kamwing Jair
- Department of Epidemiology, School of Public Health, The George Washington University, Washington, DC, USA
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12
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Liu Y, Weiss K, Zamudio AR, Hayes MP, Saleh M, Gaisa MM, Sigel K. Primary Anal Cancer Screening Results From 381 Women With Human Immunodeficiency Virus. J Infect Dis 2023; 227:932-938. [PMID: 36196502 PMCID: PMC10319954 DOI: 10.1093/infdis/jiac398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/27/2022] [Accepted: 09/30/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Women with human immunodeficiency virus (WWH) have an elevated risk for human papillomavirus (HPV)-associated anal cancer. Primary anal cancer screening results from this population could inform practice guidelines. METHODS In total, 381 WWH with anal cytology screening, high-risk HPV (hrHPV) testing and genital (cervical or vaginal) cotesting within 6 months were identified during 2012-2019. Those with anal cytology of atypical squamous cells of undetermined significance (ASCUS) or worse underwent high-resolution anoscopy and biopsy. Independent predictors of anal hrHPV, HPV16, and histological anal high-grade squamous intraepithelial lesions (aHSIL) were identified using adjusted logistic regression models. RESULTS Prevalence of anal hrHPV, HPV16, and ASCUS or worse cytology was 61%, 13%, and 68%. Histological aHSIL was detected in 42% of WWH with ASCUS or worse anal cytology. Prevalence of genital hrHPV, HPV16, and ASCUS or worse cytology was 30%, 4%, and 28%. Genital hrHPV predicted anal hrHPV (odds ratio [OR], 5.05), while genital HPV16 predicted anal HPV16 (OR, 9.52). Genital hrHPV and anal HPV16 predicted histological aHSIL (ORs, 2.78 and 10.9). CONCLUSIONS Anal HPV disease was highly prevalent in this primary screening cohort of WWH. While genital screening results predicted anal disease, rates of isolated anal HPV disease were substantial, supporting universal anal cancer screening for this population.
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Affiliation(s)
- Yuxin Liu
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Kevin Weiss
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Andrés Ramírez Zamudio
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Monica Prasad Hayes
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Mona Saleh
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Michael M Gaisa
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Keith Sigel
- Division of General Internal Medicine, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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13
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Sun J, Wiley D, Barrett BW, Hsu H, Palella FJ, Kwait J, Martinson J, D'Souza G. Comparison of anal pre-cancer screening strategies among men who have sex with men. Int J STD AIDS 2023; 34:87-97. [PMID: 36380689 PMCID: PMC9942485 DOI: 10.1177/09564624221137974] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE Comparison of anal pre-cancer screening strategies in men who have sex with men (MSM). METHODS MSM in the Multicenter AIDS Cohort Study underwent repeated anal cytology (aCyt), oncogenic human papillomavirus (oncHPV) testing. A subset received High-Resolution Anoscopy (HRA). We evaluated three screening strategies for their ability to predict anal histological High-Grade Squamous Intraepithelial lesion (HSIL): single aCyt, sequential aCyt, and oncHPV co-testing. Multivariable logistic regression models evaluated risk of HSIL among participants undergoing HRA within 5 years of screening. Sensitivity and specificity were estimated among participants with HRA, and results corrected for verification bias using weighted generalized estimating equations. RESULTS There were 1426 MSM with aCyt screening (48% people with HIV [PWH]) and 428 that underwent HRA. Median age was 57 years, 14% of PWH had CD4< 350 cells/mm3. HSIL probability was higher in MSM with one (39%, p < 0.01) or two abnormal aCyt results (46%, p < 0.01), versus those with normal aCyt (23-24%). Among men with abnormal aCyt, men with oncHPV+ had significantly higher risk than those who were oncHPV- (47% vs. 16%, p < 0.01). Specificity was modest with single aCyt+ (50%) but increased with sequential aCyt+ (79%) or oncHPV+ (67%). Sensitivity was high with single oncHPV+ (88%), moderate with single aCyt+ (66%) and oncHPV+ co-testing (61%), and low with sequential aCyt+ (39%). After correcting for potential verification bias, specificity increased and sensitivity decreased, but inferences were similar. CONCLUSION None of the screening strategies evaluated had both sufficient specificity and sensitivity to warrant routine widespread use.
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Affiliation(s)
- Jing Sun
- Department of Epidemiology, 25802Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | | | - Benjamin W Barrett
- Department of Epidemiology, 25802Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Hilary Hsu
- School of Nursing, 8783UCLA, Los Angeles, CA, USA
| | - Frank J Palella
- Division of Infectious Diseases, 12244Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Jeremy Martinson
- Department of Infectious Diseases and Microbiology, 51303University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA
| | - Gypsyamber D'Souza
- Department of Epidemiology, 25802Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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14
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Ando N, Mizushima D, Takano M, Kitamura H, Shiojiri D, Nakamoto T, Aoki T, Watanabe K, Uemura H, Gatanaga H, Oka S. Electrocautery ablation therapy for anal intraepithelial carcinoma: A study protocol. Medicine (Baltimore) 2022; 101:e32297. [PMID: 36595754 PMCID: PMC9794335 DOI: 10.1097/md.0000000000032297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Anal cancer is a human papillomavirus-related cancer. Screening with high-resolution anoscopy (HRA) and subsequent therapeutic intervention are increasingly recognized as the standard procedure for anal cancer. Generally, lesions suspected as being high-grade squamous intraepithelial lesions are biopsied and treated if they are grade 2 or 3 anal intraepithelial neoplasia (AIN). According to several studies, electrocautery ablation for grade 2 or 3 AIN is highly effective. However, relapse within and outside the targeted areas after the intervention is a clinical problem. In Japan, electrocautery ablation is not available at most facilities. Therefore, this study aims to investigate the efficacy and safety of electrocautery ablation. METHODS This single-arm, open-label, pilot intervention study will investigate the efficacy and safety of electrocautery ablative therapy using high-frequency medical devices. Patients diagnosed with grade 2 or 3 AIN will be included and will receive ablation treatment. Then, they will be followed up at 3 and 6 months after the procedure for HRA-guided sextant biopsy. To reduce the possibility of missed lesions before and after the intervention, we will perform HRA-guided sextant biopsy routinely. In this study, a sextant biopsy is defined as at least 6 biopsies in all directions, regardless of abnormal findings under HRA. The primary outcome is the recurrence rate at 6 months, and the secondary outcomes are the adverse event and recurrence rates at 3 months. CONCLUSION This pilot study will provide data on the effectiveness and safety of electrocautery ablation as a treatment for grade 2 or 3 AIN.
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Affiliation(s)
- Naokatsu Ando
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
- *Correspondence: Naokatsu Ando, AIDS Clinical Center, National Center for Global Health and Medicine, 1-21-1, Toyama, Shinjuku, Tokyo 162-0052, Japan (e-mail: )
| | - Daisuke Mizushima
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Misao Takano
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Hiroshi Kitamura
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Daisuke Shiojiri
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Takato Nakamoto
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Takahiro Aoki
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Koji Watanabe
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Haruka Uemura
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Hiroyuki Gatanaga
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
| | - Shinichi Oka
- AIDS Clinical Center, National Center for Global Health and Medicine, Tokyo, Japan
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15
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Clarke MA, Deshmukh AA, Suk R, Roberts J, Gilson R, Jay N, Stier EA, Wentzensen N. A systematic review and meta-analysis of cytology and HPV-related biomarkers for anal cancer screening among different risk groups. Int J Cancer 2022; 151:1889-1901. [PMID: 35793241 PMCID: PMC9588562 DOI: 10.1002/ijc.34199] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/25/2022] [Accepted: 06/10/2022] [Indexed: 11/12/2022]
Abstract
To inform optimal approaches for detecting anal precancers, we performed a systematic review and meta-analysis of the diagnostic accuracy of anal cancer screening tests in different populations with elevated risk for anal cancer. We conducted a literature search of studies evaluating tests for anal precancer and cancer (anal intraepithelial neoplasia grade 2 or worse, AIN2+) published between January 1, 1997 to September 30, 2021 in PubMed and Embase. Titles and abstracts were screened for inclusion and included articles underwent full-text review, data abstraction and quality assessment. We estimated the prevalence of AIN2+ and calculated summary estimates and 95% confidence intervals (CI) of test positivity, sensitivity and specificity and predictive values of various testing strategies, overall and among population subgroups. A total of 39 articles were included. The prevalence of AIN2+ was 20% (95% CI, 17-29%), and ranged from 22% in men who have sex with men (MSM) living with HIV to 13% in women and 12% in MSM without HIV. The sensitivity and specificity of cytology and HPV testing were 81% and 62% and 92% and 42%, respectively, and 93% and 33%, respectively for cytology and HPV co-testing. AIN2+ risks were similar among those testing positive for cytology, HPV, or co-testing. Limited data on other biomarkers (HPV E6/E7 mRNA and p16/Ki-67 dual stain), suggested higher specificity, but lower sensitivity compared with anal cytology and HPV. Our findings provide important evidence for the development of clinical guidelines using anal cytology and HPV testing for anal cancer screening.
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Affiliation(s)
- Megan A Clarke
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland, USA
| | - Ashish A Deshmukh
- Center for Health Services Research, Department of Management, Policy and Community Health, UTHealth School of Public Health, Houston, Texas, USA
| | - Ryan Suk
- Center for Health Services Research, Department of Management, Policy and Community Health, UTHealth School of Public Health, Houston, Texas, USA
| | | | - Richard Gilson
- Center for Clinical Research in Infection and Sexual Health, University College London, London, UK
| | - Naomi Jay
- Anal Neoplasia Clinic, Research and Education Center, University of California San Francisco, San Francisco, California, USA
| | - Elizabeth A Stier
- Department of Obstetrics and Gynecology, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland, USA
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16
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New screening strategy combining anal PAP and HPV tests for HPV-related anal cancer: a prospective, single center study. Sex Transm Dis 2022; 49:622-627. [PMID: 35687884 DOI: 10.1097/olq.0000000000001660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE The objective of this study was to evaluate the performance of a combined approach of liquid-based anal cytology and HPV testing in predicting patients who should undergo high-resolution anoscopy (HRA) for the early detection of anal cancer and anal intraepithelial neoplasia (AIN)-2 +. METHODS Prospective single-center quality improvement study. We consecutively enrolled men who had sex with men (MSM) attending our sexually transmitted disease clinic to undergo anal Pap and HPV tests. All patients with an abnormal anal Pap test result and/or positive HPV test result underwent HRA. RESULTS We enrolled 217 MSM, 80 HIV-positive patients, and 137 HIV-negative patients. Cytology showed a sensitivity of 100%, specificity of 64,1%, accuracy of 66.7%, positive predictive value (PPV) of 15,7% and negative predictive value (NPV) of 100% for the detection of AIN-2+. The high-risk (HR)-HPV test showed a sensitivity, specificity, accuracy, PPV, and NPV of 100%, 36.4%, 40%, 9.4%, and 100%, respectively. The combination of abnormal cytology with identification of infection by at least one HR-HPV strain on the HPV test had a sensitivity of 100%, specificity of 73%, accuracy of 74.6%, PPV of 19.1%, and NPV of 100%. CONCLUSION Anal HR-HPV testing, complementary to cytology, improves the diagnostic accuracy of screening for anal cancer.
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17
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Plotzker RE, Barnell GM, Wiley DJ, Stier EA, Jay N. Provider Preferences for Anal Cancer Prevention Screening: Results of the International Anal Neoplasia Society Survey. Tumour Virus Res 2022; 13:200235. [PMID: 35183808 PMCID: PMC9006639 DOI: 10.1016/j.tvr.2022.200235] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 02/02/2023] Open
Abstract
Objective This study explores provider preferences regarding anal cancer screening indications, initiation age, tools, and referral threshold to high resolution anoscopy (HRA). Methods International Anal Neoplasia Society affiliates were invited to complete an online survey. Options for initiation age and tools were delineated by sub-groups. HRA referral thresholds separately queried recommendations by patient immune status. Results One hundred forty respondents participated. Although consensus was lacking with regard to specific screening initiation age, more respondents recommended younger initiation ages for men who have sex with men (MSM) living with HIV (LWH) compared with MSM not LWH (p < 0.01). “No age threshold” ranged 44-55% among sub-groups with lower genital tract disease. Cytology and digital anorectal exam (DARE) were the most frequently selected tools for all sub-groups (ranges 77-90% and 74-86%, respectively). HRA was recommended significantly more frequently for MSM LWH (58%) and patients with vulvar cancer (52%) compared to others (p < 0.01). “Any [test] abnormality” was more often selected as indication for HRA for immunocompromised (56%) and immunocompetent (46%) patients than a specific cytology test result (29%, 36% respectively). Conclusion Cytology and DARE were preferred screening tools; screening initiation age and HRA referral threshold showed less consensus. Evidence-based guidelines are needed and may lead to more consistent screening practices.
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Affiliation(s)
- Rosalyn E Plotzker
- UCSF ANCRE Center, Mount Zion Hospital, 1600 Divisadero Street, 3rd Floor, San Francisco, CA 94115 USA.
| | - Gregory M Barnell
- Kaiser Permanente, Oakland Medical Center, Department of Surgery, 3600 Broadway, Suite 38, Oakland, CA 94611, USA.
| | - Dorothy J Wiley
- UCLA School of Nursing, 700 Tiverton Avenue, Factor Building Room #4242, Los Angeles, CA 90095-6918 USA.
| | - Elizabeth A Stier
- Boston University School of Medicine, Boston Medical Center, 771 Albany Street, Dowling 4, Boston, MA 02118 USA.
| | - Naomi Jay
- UCSF ANCRE Center, Mount Zion Hospital, 1600 Divisadero Street, 3rd Floor, San Francisco, CA 94115 USA.
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Hsu ATW, Hung YC, Fang SH, D'Adamo CR, Mavanur AA, Svoboda SM, Wolf JH. Metformin use and the risk of anal intraepithelial neoplasia in type II diabetic patients. Colorectal Dis 2021; 23:3220-3226. [PMID: 34347359 DOI: 10.1111/codi.15860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 06/16/2021] [Accepted: 07/24/2021] [Indexed: 02/08/2023]
Abstract
AIM Emerging evidence has suggested that metformin may be protective against the development of human-papillomavirus-related cancers. Anal intraepithelial neoplasia (AIN) is highly associated with human papillomavirus infection and a precancerous status of anal cancer. The aim of this study was to investigate the relationship between metformin usage and the development of AIN in a large national sample. METHODOLOGY The IBM MarketScan dataset was used to design a nested case-control study from 2010 to 2017. Patients aged 18-65 years with type 2 diabetes mellitus (DM) were evaluated, and cases of AIN were identified. Four controls were randomly selected in the risk set of each case by using incidence density sampling. The association between metformin usage and AIN was assessed using multivariate logistic regression modelling. RESULTS A total of 258 patients with type 2 DM were diagnosed with AIN during the study interval, and these were matched to 1032 control patients without a diagnosis of AIN. Patients who developed AIN had 38% lower odds of prior metformin use compared to those without a history of AIN (P < 0.01) and this finding remained robust after adjusting for age, sex, human immunodeficiency virus infection and DM complications (P = 0.02). Patients with AIN had 56% lower odds of long-term metformin use compared to control patients (P = 0.01). CONCLUSIONS An AIN diagnosis in patients with DM is associated with 56% lower likelihood of prior metformin use. This relationship suggests that metformin could potentially play a protective role against AIN. Prospective studies in non-diabetic patients are warranted to examine these findings further.
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Affiliation(s)
- Angela Ting-Wei Hsu
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ya-Ching Hung
- Department of Surgery, Sinai Hospital of Baltimore, Baltimore, Maryland, USA
| | - Sandy H Fang
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Christopher R D'Adamo
- Center for Integrative Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Arun A Mavanur
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Surgery, Sinai Hospital of Baltimore, Baltimore, Maryland, USA
| | - Shane M Svoboda
- Department of Surgery, Sinai Hospital of Baltimore, Baltimore, Maryland, USA
| | - Joshua H Wolf
- Department of Surgery, Sinai Hospital of Baltimore, Baltimore, Maryland, USA
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19
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Wei F, Gaisa MM, D'Souza G, Xia N, Giuliano AR, Hawes SE, Gao L, Cheng SH, Donà MG, Goldstone SE, Schim van der Loeff MF, Neukam K, Meites E, Poynten IM, Dai J, Combes JD, Wieland U, Burgos J, Wilkin TJ, Hernandez AL, Iribarren Díaz M, Hidalgo-Tenorio C, Valencia Arredondo M, Nyitray AG, Wentzensen N, Chow EP, Smelov V, Nowak RG, Phanuphak N, Woo YL, Choi Y, Hu Y, Schofield AM, Woestenberg PJ, Chikandiwa AT, Hickey AC, de Pokomandy A, Murenzi G, Péré H, Del Pino M, Ortiz AP, Charnot-Katsikas A, Liu X, Chariyalertsak S, Strong C, Ong JJ, Yunihastuti E, Etienney I, Ferré VM, Zou H, Segondy M, Chinyowa S, Alberts CJ, Clifford GM. Epidemiology of anal human papillomavirus infection and high-grade squamous intraepithelial lesions in 29 900 men according to HIV status, sexuality, and age: a collaborative pooled analysis of 64 studies. Lancet HIV 2021; 8:e531-e543. [PMID: 34339628 PMCID: PMC8408042 DOI: 10.1016/s2352-3018(21)00108-9] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/29/2021] [Accepted: 05/18/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND Robust age-specific estimates of anal human papillomavirus (HPV) and high-grade squamous intraepithelial lesions (HSIL) in men can inform anal cancer prevention efforts. We aimed to evaluate the age-specific prevalence of anal HPV, HSIL, and their combination, in men, stratified by HIV status and sexuality. METHODS We did a systematic review for studies on anal HPV infection in men and a pooled analysis of individual-level data from eligible studies across four groups: HIV-positive men who have sex with men (MSM), HIV-negative MSM, HIV-positive men who have sex with women (MSW), and HIV-negative MSW. Studies were required to inform on type-specific HPV infection (at least HPV16), detected by use of a PCR-based test from anal swabs, HIV status, sexuality (MSM, including those who have sex with men only or also with women, or MSW), and age. Authors of eligible studies with a sample size of 200 participants or more were invited to share deidentified individual-level data on the above four variables. Authors of studies including 40 or more HIV-positive MSW or 40 or more men from Africa (irrespective of HIV status and sexuality) were also invited to share these data. Pooled estimates of anal high-risk HPV (HR-HPV, including HPV16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, and 68), and HSIL or worse (HSIL+), were compared by use of adjusted prevalence ratios (aPRs) from generalised linear models. FINDINGS The systematic review identified 93 eligible studies, of which 64 contributed data on 29 900 men to the pooled analysis. Among HIV-negative MSW anal HPV16 prevalence was 1·8% (91 of 5190) and HR-HPV prevalence was 6·9% (345 of 5003); among HIV-positive MSW the prevalences were 8·7% (59 of 682) and 26·9% (179 of 666); among HIV-negative MSM they were 13·7% (1455 of 10 617) and 41·2% (3798 of 9215), and among HIV-positive MSM 28·5% (3819 of 13 411) and 74·3% (8765 of 11 803). In HIV-positive MSM, HPV16 prevalence was 5·6% (two of 36) among those age 15-18 years and 28·8% (141 of 490) among those age 23-24 years (ptrend=0·0091); prevalence was 31·7% (1057 of 3337) among those age 25-34 years and 22·8% (451 of 1979) among those age 55 and older (ptrend<0·0001). HPV16 prevalence in HIV-negative MSM was 6·7% (15 of 223) among those age 15-18 and 13·9% (166 of 1192) among those age 23-24 years (ptrend=0·0076); the prevalence plateaued thereafter (ptrend=0·72). Similar age-specific patterns were observed for HR-HPV. No significant differences for HPV16 or HR-HPV were found by age for either HIV-positive or HIV-negative MSW. HSIL+ detection ranged from 7·5% (12 of 160) to 54·5% (61 of 112) in HIV-positive MSM; after adjustment for heterogeneity, HIV was a significant predictor of HSIL+ (aPR 1·54, 95% CI 1·36-1·73), HPV16-positive HSIL+ (1·66, 1·36-2·03), and HSIL+ in HPV16-positive MSM (1·19, 1·04-1·37). Among HPV16-positive MSM, HSIL+ prevalence increased with age. INTERPRETATION High anal HPV prevalence among young HIV-positive and HIV-negative MSM highlights the benefits of gender-neutral HPV vaccination before sexual activity over catch-up vaccination. HIV-positive MSM are a priority for anal cancer screening research and initiatives targeting HPV16-positive HSIL+. FUNDING International Agency for Research on Cancer.
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Affiliation(s)
- Feixue Wei
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Michael M Gaisa
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Gypsyamber D'Souza
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ningshao Xia
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Anna R Giuliano
- Center for Immunization and Infection Research in Cancer, Moffitt Cancer Center, Tampa, FL, USA
| | - Stephen E Hawes
- Department of Epidemiology, Department of Health Services, and Department of Global Health, University of Washington, Seattle, WA, USA
| | - Lei Gao
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, and Center for Tuberculosis Research, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shu-Hsing Cheng
- Department of Infectious Diseases, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan; School of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Maria Gabriella Donà
- Sexually Transmitted Infections/HIV Unit, San Gallicano Dermatological Institute, IRCCS, Rome, Italy
| | - Stephen E Goldstone
- Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Maarten F Schim van der Loeff
- Department of Infectious Diseases, Public Health Service of Amsterdam, Amsterdam, Netherlands; Department of Internal Medicine, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Karin Neukam
- Unidad Clínica de Enfermedades Infecciosas y Medicina Preventiva, UCEIMP, Instituto de Biomedicina de Sevilla, CSIC, Universidad de Sevilla, Hospital Universitario Virgen del Rocío, Seville, Spain
| | - Elissa Meites
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - I Mary Poynten
- Kirby Institute, University of New South Wales, Sydney, NSW, Australia
| | - Jianghong Dai
- School of Public Health, Xinjiang Medical University, Xinjiang, Urumqi, China
| | - Jean-Damien Combes
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Ulrike Wieland
- Institute of Virology, University of Cologne, National Reference Center for Papilloma and Polyomaviruses, Cologne, Germany
| | - Joaquin Burgos
- Department of infectious Diseases, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Timothy J Wilkin
- Division of Infectious Diseases, Weill Cornell Medicine, New York, NY, USA
| | - Alexandra L Hernandez
- Department of Medicine, University of California, San Francisco, CA, USA; Public Health Program, College of Education and Health Sciences, Touro University, Vallejo, CA, USA
| | - Mauricio Iribarren Díaz
- Department of Surgery, Complexo Hospitalario Universitario de Vigo-Hospital Álvaro Cunqueiro, Vigo, Spain
| | - Carmen Hidalgo-Tenorio
- Infectious Disease Unit, Biosanitary Research Institute Granada, University Hospital Virgen de las Nieves, Granada, Spain
| | - Marleny Valencia Arredondo
- Universidad de Antioquia, Escuela de Microbiología, Grupo de investigación Salud Sexual y Cáncer, Medellín, Antioquia, Colombia
| | - Alan G Nyitray
- Clinical Cancer Center and Center for AIDS Intervention Research, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Eric Pf Chow
- Melbourne Sexual Health Centre, The Alfred Hospital, Melbourne, VIC, Australia; Central Clinical School, Monash University, Melbourne, VIC, Australia; Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia
| | - Vitaly Smelov
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France; Division of Country Health Programmes, WHO Regional Office for Europe, Copenhagen, Denmark
| | - Rebecca G Nowak
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Nittaya Phanuphak
- Institute of HIV Research and Innovation, Bangkok, Thailand; Center of Excellence in Transgender Health, Chulalongkorn University, Bangkok, Thailand
| | - Yin Ling Woo
- Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Yoojin Choi
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Yifei Hu
- Department of Child and Adolescent Health and Maternal Care, School of Public Health, Capital Medical University, Beijing, China
| | - Alice M Schofield
- Institute of Cancer Sciences, University of Manchester, Manchester, UK
| | - Petra J Woestenberg
- Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Admire T Chikandiwa
- Wits RHI, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Andrew C Hickey
- Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Nonthaburi, Thailand
| | - Alexandra de Pokomandy
- Chronic Viral Illness Service, McGill University Health Centre and Department of Family Medicine, McGill University, Montreal, QC, Canada
| | - Gad Murenzi
- Rwanda Military Hospital and Research for Development Rwanda, Kigali, Rwanda
| | - Hélène Péré
- Assistance Publique Hôpitaux de Paris-Centre, Service de Microbiologie (Unité de virologie), Hôpital Européen Georges Pompidou, Paris, France; Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Université de Paris, Functional Genomics of Solid Tumors Laboratory, Equipe Labellisée Ligue Nationale contre le Cancer, Labex OncoImmunology, Paris, France
| | - Marta Del Pino
- Institute Clinic of Gynecology, Obstetrics, and Neonatology, Gynecology Oncology Unit, Hospital Clínic, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain; Medicine Faculty, Barcelona University, Barcelona, Spain
| | - Ana P Ortiz
- Cancer Control and Population Sciences Program, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR, USA; Graduate School of Public Health, University of Puerto Rico, San Juan, PR, USA
| | - Angella Charnot-Katsikas
- Department of Pathology, The University of Chicago, Chicago, IL, USA; MolDx Program, Palmetto GBA, Columbia, SC, USA
| | - Xing Liu
- Department of Epidemiology, School of Public Health, and the Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai, China
| | - Suwat Chariyalertsak
- Faculty of Public Health, Chiang Mai University and Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Carol Strong
- Department of Public Health, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jason J Ong
- Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Evy Yunihastuti
- Department of Internal Medicine, University of Indonesia, Jakarta, Indonesia
| | | | - Valentine M Ferré
- Université de Paris, Assistance Publique-Hôpitaux de Paris, Service de Virologie, Hôpital Bichat, Paris, France; Decision Science in Infectious Disease Prevention, Control and Care, INSERM, Université de Paris, Paris, France
| | - Huachun Zou
- Kirby Institute, University of New South Wales, Sydney, NSW, Australia; School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China; School of Public Health, Shanghai Jiao Tong University, Shanghai, China; Melbourne Sexual Health Centre, Sydney, NSW, Australia
| | - Michel Segondy
- Pathogenesis and Control of Chronic Infections, INSERM, CHU, University of Montpellier, Montpellier, France
| | - Simbarashe Chinyowa
- Department of Surgery, College of Health Sciences University of Zimbabwe, Harare, Zimbabwe
| | - Catharina J Alberts
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France
| | - Gary M Clifford
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO), Lyon, France.
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Evaluation of HPV-Related Biomarkers in Anal Cytological Samples from HIV-Uninfected and HIV-Infected MSM. Pathogens 2021; 10:pathogens10070888. [PMID: 34358038 PMCID: PMC8308578 DOI: 10.3390/pathogens10070888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/08/2021] [Accepted: 07/10/2021] [Indexed: 11/21/2022] Open
Abstract
Men who have sex with men (MSM) harbor the highest risk for anal carcinoma, mainly caused by Human Papillomavirus (HPV). The use of HPV-related biomarkers in the screening for this neoplasia is still debated. We assessed the association between high-risk (hr)HPV DNA, HPV16/18 DNA, hrHPV E6/E7 mRNA, and p16/Ki-67 with cytological abnormalities (any grade) and high-grade intraepithelial lesions (HSIL) in HIV-uninfected and HIV-infected MSM. Overall, 150 cytological samples in PreservCyt (Hologic), with a negative to HSIL report, were analyzed for hrHPV DNA, hrHPV E6/E7 mRNA, and p16/Ki-67 using the Linear Array (Roche), Aptima (Hologic), and CINtec® PLUS (Roche) assays. In HIV-infected MSM, positivity for all the biomarkers significantly increased with the cytological grade. In both populations, the association of hrHPV E6/E7 mRNA and p16/Ki-67 positivity with HPV16 did not differ significantly compared to hrHPVs other than HPV16. In HIV-uninfected MSM, the odds of having an HSIL increased approximately six times for the p16/Ki-67 positive cases. In HIV-infected individuals, all the biomarkers showed a significant association with HSIL, except for hrHPV DNA, with the strongest association observed for p16/Ki-67. The odds of HSIL increased almost 21 times in those positive for this biomarker. Our results encourage further investigation on the use of p16/Ki-67 dual staining in anal cancer screening for HIV-uninfected and HIV-infected MSM.
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