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Loughrey MB, Shepherd NA. Anal and Perianal Preneoplastic Lesions. Gastroenterol Clin North Am 2024; 53:201-220. [PMID: 38280748 DOI: 10.1016/j.gtc.2023.09.007] [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] [Indexed: 01/29/2024]
Abstract
Anal cancer, mainly squamous cell carcinoma, is rare but increasing in prevalence, as is its precursor lesion, anal squamous dysplasia. They are both strongly associated with human papillomavirus infection. The 2-tiered Lower Anogenital Squamous Terminology classification, low-grade SIL and high-grade SIL, is preferred to the 3-tiered anal intraepithelial neoplasia classification because of better interobserver agreement and clearer management implications. Immunohistochemistry with p16 is helpful to corroborate the diagnosis of squamous dysplasia. Similarly, immunohistochemistry is helpful to differentiate primary Paget disease from secondary Paget disease, which is usually due to anal squamous mucosal/epidermal involvement by primary rectal adenocarcinoma.
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Affiliation(s)
- Maurice B Loughrey
- Department of Cellular Pathology, Royal Victoria Hospital, Grosvenor Road, Belfast, Northern Ireland BT12 6BA, United Kingdom.
| | - Neil A Shepherd
- Gloucestershire Cellular Pathology Laboratory, Cheltenham General Hospital, Sandford Road, Cheltenham GL53 7AN, United Kingdom
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Faber MT, Frederiksen K, Palefsky JM, Kjaer SK. A nationwide longitudinal study on risk factors for progression of anal intraepithelial neoplasia grade 3 to anal cancer. Int J Cancer 2022; 151:1240-1247. [PMID: 35657350 PMCID: PMC9545245 DOI: 10.1002/ijc.34143] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 11/13/2022]
Abstract
Little is known about risk factors for progression of high‐grade anal intraepithelial neoplasia (AIN) to anal squamous cell carcinoma (ASCC). In this large, population‐based study, we assess the role of factors related to immune status for the risk of ASCC among individuals from the general population with a diagnosis of AIN3. Individuals diagnosed with AIN3 during 1985‐2016 were identified in the Danish Pathology Registry and followed for subsequent development of ASCC. The study population was linked to the National Patient Registry, the Danish Prescription Registry and the Danish HIV Cohort Study for information on autoimmune disease, genital warts and HIV status. To study the progression rate, Cox regression models with hazard ratios (HR) and 95% confidence intervals (CI) were applied with time since AIN3 as the underlying time scale and with adjustment for age at AIN3 diagnosis, year of AIN3 diagnosis and sex. The study population comprised 1222 individuals with AIN3 contributing 12 824 person‐years of follow‐up. Ninety‐seven individuals (7.9%) developed ASCC. Individuals registered with an autoimmune disease or genital warts before and/or after the AIN3 diagnosis had an increased rate of progression to ASCC compared to individuals without these conditions. People living with HIV had a higher progression rate than HIV‐negative individuals (HR = 4.25; 95% CI: 1.87‐9.65) with the highest progression rate among those with CD4 count ≤200 cells/μL. These associations may be caused by an interplay between HPV infection and immunosuppression.
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Affiliation(s)
- Mette T Faber
- Danish Cancer Society Research Center, Virus, Lifestyle and Genes, Strandboulevarden 49, DK-2100, Copenhagen, Denmark
| | - Kirsten Frederiksen
- Danish Cancer Society Research Center, Statistics and Data Analysis, Strandboulevarden 49, DK-2100, Copenhagen, Denmark
| | - Joel M Palefsky
- Department of Medicine, University of California, 513 Parnassus Ave, San Francisco, CA, USA
| | - Susanne K Kjaer
- Danish Cancer Society Research Center, Virus, Lifestyle and Genes, Strandboulevarden 49, DK-2100, Copenhagen, Denmark.,Department of Gynecology, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, DK2100, Copenhagen, Denmark
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3
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Barroso LF, Stier EA, Hillman R, Palefsky J. Anal Cancer Screening and Prevention: Summary of Evidence Reviewed for the 2021 Centers for Disease Control and Prevention Sexually Transmitted Infection Guidelines. Clin Infect Dis 2022; 74:S179-S192. [PMID: 35416975 DOI: 10.1093/cid/ciac044] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In June 2019 the Centers for Disease Control and Prevention (CDC) convened an advisory group to assist in development of the 2021 CDC sexually transmitted infections (STI) guidelines. The advisory group on anal cancer screening and prevention met to formulate key questions in this field. The group examined published literature and abstracts to assess evidence and give recommendations for development of the CDC guidelines. This article summarizes key questions, evidence, recommendations, and areas for further research for the screening, diagnosis, and prevention of anal cancer.
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Affiliation(s)
- Luis F Barroso
- Internal Medicine/Infectious Diseases, Wake Forest University Health Sciences, Winston-Salem, North CarolinaUSA
| | - Elizabeth A Stier
- Obstetrics and Gynecology, Boston University School of Medicine, Boston Medical Center, Boston, MassachusettsUSA
| | - Richard Hillman
- Dysplasia and Anal Cancer Services, St Vincent's Hospital, Darlinghurst, Sydney, Australia
| | - Joel Palefsky
- Infectious Diseases, University of California, San Francisco, CaliforniaUSA
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McNeil CJ, Lee JS, Cole SR, Patel SA, Martin J, Mathews WC, Moore RD, Mayer KH, Eron JJ, Saag MS, Kitahata MM, Achenbach CJ. Anal cancer incidence in men with HIV who have sex with men: are black men at higher risk? AIDS 2022; 36:657-664. [PMID: 34923519 PMCID: PMC10115425 DOI: 10.1097/qad.0000000000003151] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To assess differences in anal cancer incidence between racial/ethnic groups among a clinical cohort of men with HIV who have sex with men. DESIGN Clinical cohort study. METHODS We studied men who have sex with men (MSM) in the Centers for AIDS Research Network of Integrated Clinical Systems (CNICS) who initiated antiretroviral therapy (ART) under HIV care in CNICS. We compared anal cancer incidence between Black and non-Black men and calculated hazard ratios controlling for demographic characteristics (age, CNICS site, year of ART initiation), HIV disease indicators (nadir CD4+, peak HIV RNA), and co-infection/behavioral factors including hepatitis B virus (HBV), hepatitis C virus (HCV), tobacco smoking and alcohol abuse. RESULTS We studied 7473 MSM with HIV who contributed 41 810 person-years of follow-up after initiating ART between 1996 and 2014 in CNICS. Forty-one individuals had an incident diagnosis of anal cancer under observation. Crude rates of anal cancer were 204 versus 61 per 100 000 person-years among Black versus non-Black MSM. The weighted hazard ratio for anal cancer in Black MSM (adjusting for demographics, HIV disease factors, and co-infection/behavioral factors) was 2.37 (95% confidence interval: 1.17, 4.82) compared to non-Black MSM. CONCLUSIONS In this large multicenter cohort, Black MSM were at significantly increased risk for anal cancer compared to non-Black MSM. Further detailed studies evaluating factors impacting anal cancer incidence and outcomes in Black men with HIV are necessary. Inclusion of more diverse study cohorts may elucidate modifiable factors associated with increased anal cancer risk experienced by Black MSM.
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Affiliation(s)
- Candice J. McNeil
- Department of Internal Medicine, Section on Infectious Diseases, Wake Forest School of Medicine, Winston Salem, North Carolina
| | - Jennifer S. Lee
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Stephen R. Cole
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Shivani A. Patel
- Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - Jeffrey Martin
- Department of Epidemiology and Biostatistics, University of California-San Francisco, San Francisco
| | - William C. Mathews
- Department of Medicine, University of California-San Diego Medical Center, San Diego, California
| | - Richard D. Moore
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kenneth H. Mayer
- The Fenway Institute, Harvard Medical School, Boston, Massachusetts
| | - Joseph J. Eron
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Michael S. Saag
- Department of Medicine, University of Alabama-Birmingham School of Medicine, Birmingham, Alabama
| | - Mari M. Kitahata
- Department of Medicine, University of Washington School of Medicine, Seattle, Washington
| | - Chad J. Achenbach
- Departments of Medicine and Preventive Medicine, Institute for Global Health, Third Coast Center for AIDS Research, and The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois, USA
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Effectiveness of the Quadrivalent HPV Vaccine in Preventing Anal ≥ HSILs in a Spanish Population of HIV+ MSM Aged > 26 Years. Viruses 2021; 13:v13020144. [PMID: 33498165 PMCID: PMC7908967 DOI: 10.3390/v13020144] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/07/2021] [Accepted: 01/12/2021] [Indexed: 12/22/2022] Open
Abstract
Anal squamous cell carcinoma is the most frequent virus-related non-AIDS-defining neoplasia among HIV-infected individuals, especially MSM. The objectives of this study were to analyze the effectiveness of the quadrivalent HPV (qHPV) vaccine to prevent anal ≥ high-grade squamous intraepithelial lesions (≥HSILs), external ano-genital lesions (EAGLs), and infection by qHPV vaccine genotypes in HIV+ MSM, and to study the immunogenicity of the vaccine and risk factors for ≥ HSILs. This study is nested within a randomized, double-blind, placebo-controlled trial of the qHPV vaccine, which enrolled participants between May 2012 and May 2014, with a 48-month follow-up. A vaccine or placebo was administered at 0, 2, and 6 months, and vaccine antibody titers were evaluated at 7, 12, 24, 36, and 48 months. Data were gathered at 12, 24, 36, and 48 months on sexual habits, CD4/CD8 cell/counts, HIV viral load, and the results of cytology (Thin Prep® Pap Test), HPV PCR genotyping (Linear Array HPV Genotyping Test), and high-resolution anoscopy (Zeiss 150 fc© colposcope). The study included 129 patients (mean age of 38.8 years, 40 [31%] with a history of AIDS, 119 [92.2%] receiving ART, and 4 [3.3%] with virological failure), 66 (51.2%) in vaccine arm and 63 (48.4%) in placebo arm. The vaccine and placebo groups did not differ in ≥ HSILs (14.1 vs. 13.1%, respectively, p = 0.98) or EAGL (11.1 vs. 6.8%, p = 0.4) rates during follow-up; however, a protective effect against HPV 6 was observed during the first year of follow-up in the vaccine versus placebo group (7.5% vs. 23.4%; p = 0.047). A between-arm difference (p = 0.0001) in antibodies against qHPV vaccine genotypes was observed at 7 months (76.9% in vaccine arm vs. 30.2% in placebo arm), 12 months (68.1% vs. 26.5%), 24 months (75% vs. 32.5%), 36 months (90% vs. 24.4%), and 48 months (87.2% vs. 30%). Finally, the factor associated with the risk of anal ≥ HSIL onset during the four-year follow-up was the receipt of the last dose of the vaccine less than 6 months earlier in comparison to those vaccinated for a longer period (82.4% vs. 17.6% (OR 0.869 [95% CI, 0.825-0.917]). Vaccine and placebo arms did not significantly differ in ≥ HSIL or EAGL rates or in protection against infection by HPV genotype vaccine except for HPV6 at 12 months after the first dose. A long-lasting immune response was observed in almost all the vaccinated men. The main protective factor against ≥ HSIL was to have completed the vaccination regimen more than 6 months earlier.
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Knight K, Al-Wahid M, Choong JX, Burton K, Lindsay R, McKee RF, Anderson JH, Roxburgh CS. Multidisciplinary management of anal intraepithelial neoplasia and rate of progression to cancer: A retrospective cohort study. Eur J Surg Oncol 2020; 47:304-310. [PMID: 32873453 DOI: 10.1016/j.ejso.2020.08.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/10/2020] [Indexed: 01/19/2023] Open
Abstract
PURPOSE To describe the regional burden of AIN and rate of progression to cancer in patients managed in specialist and non-specialist clinic settings. METHODS Patients with a histopathological diagnosis of AIN between 1994 and 2018 were retrospectively identified. Clinicopathological characteristics including high-risk status (chronic immunosuppressant use or HIV positive), number and type of biopsy (punch/excision) and histopathological findings were recorded. The relationship between clinicopathological characteristics and progression to cancer was assessed using logistic regression. RESULTS Of 250 patients identified, 207 were eligible for inclusion: 144 from the specialist and 63 from the non-specialist clinic. Patients in the specialist clinic were younger (<40 years 31% vs 19%, p = 0.007), more likely to be male (34% vs 16%, p = 0.008) and HIV positive (15% vs 2%, p = 0.012). Patients in the non-specialist clinic were less likely to have AIN3 on initial pathology (68% vs 79%, p = 0.074) and were more often followed up for less than 36 months (46% vs 28%, p = 0.134). The rate of progression to cancer was 17% in the whole cohort (20% vs 10%, p = 0.061). On multivariate analysis, increasing age (OR 3.02, 95%CI 1.58-5.78, p < 0.001), high risk status (OR 3.53, 95% CI 1.43-8.74, p = 0.006) and increasing number of excisions (OR 4.88, 95%CI 2.15-11.07, p < 0.001) were related to progression to cancer. CONCLUSION The specialist clinic provides a structured approach to the follow up of high-risk status patients with AIN. Frequent monitoring with specialist assessments including high resolution anoscopy in a higher volume clinic are required due to the increased risk of progression to anal cancer.
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Affiliation(s)
- Katrina Knight
- Academic Unit of Colorectal Surgery, University of Glasgow, Level 2, New Lister Building, Glasgow Royal Infirmary, 10 - 16 Alexandra Parade, Glasgow G31 2ER, Scotland, UK.
| | - Muhammed Al-Wahid
- Department of Surgery, Glasgow Royal Infirmary, 84 Castle Street, Glasgow, G4 0SF, Scotland, UK
| | - Jia Xun Choong
- Undergraduate School of Medicine, Wolfson Medical School Building, University Avenue, Glasgow, G12 8QQ, Scotland, UK
| | - Kevin Burton
- Department of Gynaecological Oncology, Glasgow Royal Infirmary, PRMH Building, 16 Alexandra Parade, Glasgow, G31 2ER, Scotland, UK
| | - Rhona Lindsay
- Department of Gynaecological Oncology, Glasgow Royal Infirmary, PRMH Building, 16 Alexandra Parade, Glasgow, G31 2ER, Scotland, UK
| | - Ruth F McKee
- Department of Surgery, Glasgow Royal Infirmary, 84 Castle Street, Glasgow, G4 0SF, Scotland, UK
| | - John H Anderson
- Department of Surgery, Glasgow Royal Infirmary, 84 Castle Street, Glasgow, G4 0SF, Scotland, UK
| | - Campbell Sd Roxburgh
- Academic Unit of Colorectal Surgery, University of Glasgow, Level 2, New Lister Building, Glasgow Royal Infirmary, 10 - 16 Alexandra Parade, Glasgow G31 2ER, Scotland, UK
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Pessia B, Romano L, Giuliani A, Lazzarin G, Carlei F, Schietroma M. Squamous cell anal cancer: Management and therapeutic options. Ann Med Surg (Lond) 2020; 55:36-46. [PMID: 32461801 PMCID: PMC7240186 DOI: 10.1016/j.amsu.2020.04.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 04/02/2020] [Accepted: 04/19/2020] [Indexed: 02/06/2023] Open
Abstract
The incidence of anal cancer has increased during the second half of the 20th century, with an incidence rate over 2.9% greater than in the decade of 1992-2001. Yet, it still constitutes a small percentage, about 4%, of all anorectal tumours. Its risk factors are human papillomavirus infection, a history of sexually transmitted diseases, a history of vulvar or cervical carcinoma, immunosuppression related to human immunodeficiency virus infection or after organ transplantation, haematological or immunological disorders, and smoking. The most frequent symptom is rectal bleeding (45%), followed by anal pain, and sensation of a rectal mass. The diagnosis requires clinical examination, palpation of the inguinal lymph nodes, high resolution anoscopy followed by fine-needle aspiration biopsy or core biopsy. Subsequent histologic diagnosis is necessary, as well as computed tomography or magnetic resonance imaging evaluation of the pelvic lymph nodes. Since 1980, patients with a diagnosis of anal cancer have shown a significant improvement in survival. In Europe during the years 1983-1994, 1-year survival increased from 78% to 81%, and the improvement over 5 years was between 48% and 54%. Prior to 1974, patients with invasive cancer were routinely scheduled for abdominoperineal amputation, after which it was demonstrated that treatment with 5-fluorouracil and radiotherapy associated with mitomycin or capecitabine could be adequate to treat the tumour without surgery. Today, numerous studies have confirmed that combined multimodal treatment is effective and sufficient.
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Affiliation(s)
- Beatrice Pessia
- Department of Surgery, Department of Applied Clinical Science and Biotechnology, University of L'Aquila, L'Aquila, Italy
| | - Lucia Romano
- Department of Surgery, Department of Applied Clinical Science and Biotechnology, University of L'Aquila, L'Aquila, Italy
| | - Antonio Giuliani
- Department of Surgery, Department of Applied Clinical Science and Biotechnology, University of L'Aquila, L'Aquila, Italy
| | - Gianni Lazzarin
- Department of Surgery, Department of Applied Clinical Science and Biotechnology, University of L'Aquila, L'Aquila, Italy
| | - Francesco Carlei
- Department of Surgery, Department of Applied Clinical Science and Biotechnology, University of L'Aquila, L'Aquila, Italy
| | - Mario Schietroma
- Department of Surgery, Department of Applied Clinical Science and Biotechnology, University of L'Aquila, L'Aquila, Italy
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Faber MT, Frederiksen K, Palefsky JM, Kjaer SK. Risk of Anal Cancer Following Benign Anal Disease and Anal Cancer Precursor Lesions: A Danish Nationwide Cohort Study. Cancer Epidemiol Biomarkers Prev 2019; 29:185-192. [PMID: 31597665 DOI: 10.1158/1055-9965.epi-19-0601] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/16/2019] [Accepted: 09/26/2019] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Human papillomavirus (HPV) is associated with the majority of anal high-grade intraepithelial neoplasia (AIN) and anal cancers. Little is known about the risk of anal cancer following a diagnosis of benign anal disease and AIN. METHODS Using data from nationwide, population-based Danish registries, a cohort of 126,174 individuals with either non-neoplastic anal disease or AIN 1 to 3 during 1970 to 2016 was followed until first occasion of anal cancer. Information on HIV status was obtained from the Danish HIV Cohort Study. The absolute risk of anal cancer was estimated using the Aalen-Johansen estimator taking into account censoring at emigration and end of follow-up and competing risk at time of death. Standardized incidence ratios (SIR) for anal cancer among individuals with non-neoplastic anal disease, including inflammatory lesions, hemorrhoids, and polyps, were estimated in Poisson models. Sex-, age-, and calendar period-specific national population rates were estimated using the Danish National Pathology Registry. RESULTS Anal cancer risk increased with increasing severity of lesions, reaching 4% 5 years after diagnosis of AIN3. Even among those with non-neoplastic anal lesions, particularly inflammatory lesions, anal cancer risk was significantly higher than expected from Danish national anal cancer rates (SIR = 2.8; 95% confidence intervals, 2.3-3.2). The absolute 5-year risk of anal cancer following AIN3 was considerably higher among HIV-positive (14.1%) than HIV-negative (3.2%) individuals. CONCLUSIONS Anal cancer risk increases with increasing severity of lesions and is especially high among HIV-positive individuals. IMPACT Vaccination against HPV is important in the prevention of both high-grade AIN and anal cancer.
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Affiliation(s)
- Mette T Faber
- Danish Cancer Society Research Center, Virus, Lifestyle and Genes, Copenhagen, Denmark
| | - Kirsten Frederiksen
- Danish Cancer Society Research Center, Statistics and Pharmacoepidemiology, Copenhagen, Denmark
| | - Joel M Palefsky
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Susanne K Kjaer
- Danish Cancer Society Research Center, Virus, Lifestyle and Genes, Copenhagen, Denmark. .,Department of Gynecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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Svidler López L, La Rosa L. Human Papilloma Virus Infection and Anal Squamous Intraepithelial Lesions. Clin Colon Rectal Surg 2019; 32:347-357. [PMID: 31507344 DOI: 10.1055/s-0039-1687830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This article addresses the natural history of the human papilloma virus (HPV) infection to anal squamous intraepithelial lesions, and onto squamous cell carcinoma of the anus. This article provides overviews of the virology, pathophysiology, nomenclature, classification, historical terms, risk factors, clinical evaluation, differential diagnosis, and treatment of HPV infection and its sequelae.
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Affiliation(s)
- Laura Svidler López
- Department of Surgery, Hospital General de Agudos Juan A. Fernández, Buenos Aires, Argentina
| | - Luciana La Rosa
- Department of Surgery, Centro de Educación Médica e Investigaciones clínicas, Buenos Aires, Argentina.,Centro Privado de Cirugía y Coloproctología, Buenos Aires, Argentina
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Progression of anal intraepithelial neoplasia in HIV-positive individuals: predisposing factors. Tech Coloproctol 2019; 23:325-332. [PMID: 31016550 DOI: 10.1007/s10151-019-01951-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 02/17/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND The aim of the present study was to evaluate patient factors that affect the progression of anal dysplasia in human immunodeficiency virus (HIV)-positive individuals. METHODS A retrospective cohort study of HIV-positive adults with human papilloma virus related anal lesions was performed from 2012 to 2017. All patients underwent surgical excision or biopsy and fulguration of lesions in the operating room without using high resolution anoscopy. Patients with initial presentation of squamous cell carcinoma were excluded. The study was designed to investigate progression between the first available histology and either the follow up histology or a negative examination. Patient files were reviewed and data was collected. A bivariate analysis of continuous and categorical variables was performed. RESULTS One hundred and sixty-one patients met the inclusion criteria. Ninety-seven percent were male. Mean age was 41 years. Thirty-five percent were African American and 47% were Caucasian. After a median follow-up interval of 331 days (IQR 120-615 days) 14 (9%) of patients had progression of disease. Visible lesions on initial presentation, as opposed to lesions found in patients undergoing examination under anesthesia because of HSIL on anal pap smear, was associated with progression (p = 0.0.2). A lower initial CD4 count (p = 0.01) and initial surgical pathology of anal condylomata (p = 0.01) were also associated with progression. High-risk serotype was associated with no change or regression (p = 0.01). CONCLUSIONS In our large cohort of HIV-positive patients treated without high resolution anoscopy the rate of progression was low. Most notably, visible lesions at initial presentation and CD4 count when lower were associated with progression. Initial surgical pathology of anal condylomata was associated with progression, while high-risk serotypes correlated with regression or stability. Identification of risk factors has important implications concerning postoperative surveillance and counseling of HIV-positive patients with anal condylomata/ anal dysplasia.
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Abstract
BACKGROUND The risk of anal carcinoma after previous diagnosis of anal intraepithelial neoplasia III is unclear. OBJECTIVE The purpose of this study was to estimate the risk of anal carcinoma in patients with anal intraepithelial neoplasia III and to identify predictors for subsequent malignancy. DESIGN This was a retrospective review using the Surveillance, Epidemiology, and End Results registry (1973-2014). SETTING The study was composed of population-based cancer registries from the United States. PATIENTS Patients who were diagnosed with anal intraepithelial neoplasia III were included. MAIN OUTCOME MEASURES The primary outcome was rate of subsequent anal squamous cell carcinoma. Predictors for anal cancer were identified using logistic regression and Cox proportional hazard models. RESULTS A total of 2074 patients with anal intraepithelial neoplasia III were identified and followed for a median time of 4.0 years (interquartile range, 1.8-6.7 y). Of the cohort, 171 patients (8.2%) subsequently developed anal cancer. Median time from anal intraepithelial neoplasia III diagnosis to anal cancer diagnosis was 2.7 years (interquartile range, 1.1-4.5 y). Fifty-two patients (30.4%) who developed anal carcinoma were staged T2 or higher. Ablative therapies for initial anal intraepithelial neoplasia III were associated with a reduction in the risk of anal cancer (OR = 0.3 (95% CI, 0.1-0.7); p = 0.004). Time-to-event analysis revealed that the 5-year incidence of anal carcinoma after anal intraepithelial neoplasia III was 9.5% or ≈1.9% per year. LIMITATIONS The registry did not record HIV status, surveillance schedule, use of high-resolution anoscopy, or provider specialty. CONCLUSIONS In the largest published cohort of patients with anal intraepithelial neoplasia III, ≈10% of patients were projected to develop anal cancer within 5 years. Nearly one third of anal cancers were diagnosed at stage T2 or higher despite a previous diagnosis of anal intraepithelial neoplasia III. Ablative procedures were associated with a decreased risk of cancer. This study highlights the considerable rate of malignancy in patients with anal intraepithelial neoplasia III and the need for effective therapies and surveillance. See Video Abstract at http://links.lww.com/DCR/A764.
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Yeoh A, Bell S, Farmer C, Carne P, Skinner S, Chin M, Warrier S. Clinical evaluation of anal intraepithelial neoplasia: are we missing the boat? ANZ J Surg 2018; 89:E1-E4. [PMID: 30239099 DOI: 10.1111/ans.14845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 07/27/2018] [Accepted: 08/06/2018] [Indexed: 12/18/2022]
Abstract
BACKGROUND Anal intraepithelial neoplasia (AIN) is dysplasia in the epithelium of the anus and is a pre-malignant condition associated with a low rate of progression to invasive squamous cell carcinoma (SCC). The natural history of progression for AIN to anal SCC is poorly defined. This study aims to review our experience with AIN and investigate the natural history of progression. METHODS Data on all patients with AIN from January 2005 to December 2015 were retrospectively reviewed. Three separate databases were searched - Colorectal, Radiation Oncology and Infectious Diseases. All databases were cross-referred to obtain a complete but non-duplicated data set. Electronic charts were reviewed to obtain clinical information. RESULTS Twenty-eight patients were identified with AIN of various grades. There were 25 males, three females. Twenty of the male patients were human immunodeficiency virus (HIV) positive. Mean length of follow up was 56 months. Complete regression of AIN to normal was noted in 13 patients (46%). Four patients had persisting AIN III with no evidence of regression or malignant transformation. Nine patients with pre-existing AIN developed SCC (32%). Seven were positive for HIV infection (all males). Median time to progression was 36 months. None of the patients demonstrated clear linear pattern of progression of AIN to SCC. CONCLUSION High grade AIN may progress to anal SCC and surveillance is indicated. The exact natural history of progression for AIN is difficult to predict. There is no linear progression over time evident. HIV patients with AIN are at higher risk of developing SCC.
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Affiliation(s)
- Adrian Yeoh
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
| | - Stephen Bell
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
| | - Chip Farmer
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
| | - Peter Carne
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
| | - Stewart Skinner
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
| | - Martin Chin
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
| | - Satish Warrier
- Department of Colorectal Surgery, Alfred Hospital, Melbourne, Victoria, Australia
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Lam JO, Barnell GM, Merchant M, Ellis CG, Silverberg MJ. Acceptability of high-resolution anoscopy for anal cancer screening in HIV-infected patients. HIV Med 2018; 19:716-723. [PMID: 30084191 DOI: 10.1111/hiv.12663] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVES HIV-infected individuals are at increased risk of anal cancer. Screening for anal cancer precursors using high-resolution anoscopy (HRA) may be clinically beneficial. In this study, we examined patient tolerability of this procedure. METHODS The acceptability of HRA was evaluated among HIV-infected patients who completed a first-time HRA between July 2008 and December 2013 at Kaiser Permanente Northern California. We reviewed electronic medical records to identify lack of HRA acceptability, which was defined as receipt of HRA with sedation, dispensation of opioid analgaesia, and/or an urgent care visit following HRA, and to evaluate factors associated with patients not returning for a recommended repeat HRA (proxy for HRA acceptability). HRA acceptability was also assessed via a survey mailed to patients who completed HRA between January 2014 and August 2014. Logistic regression was used to model lack of acceptability of initial HRA and likelihood of not returning for a repeat HRA. RESULTS Of 1857 HIV-infected patients, 94 were prescribed opioids and one had an urgent care visit. Lack of HRA acceptability was more likely in patients with pre-existing anal conditions [e.g. warts or fissure; adjusted odds ratio (aOR) 4.02; 95% confidence interval (CI) 2.4-6.7], those who had ever smoked (aOR 1.6; 95% CI 1.0-2.5) and women (aOR 5.3; 95% CI 1.6-17.5). Fifty per cent of patients returned for a repeat HRA, with younger patients less likely to return (per 10-year age interval, aOR 0.8; 95% CI 0.7-0.9). Of 48 survey respondents, 91.7% reported acceptable pain levels and all reported willingness to return for a repeat HRA. CONCLUSIONS HRA was generally well tolerated and may be an acceptable screening approach for patients at high risk of anal cancer.
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Affiliation(s)
- J O Lam
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
| | - G M Barnell
- Oakland Medical Center, Kaiser Permanente Northern California, Oakland, CA, USA
| | - M Merchant
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
| | - C G Ellis
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
| | - M J Silverberg
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
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15
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The American Society of Colon and Rectal Surgeons Clinical Practice Guidelines for Anal Squamous Cell Cancers (Revised 2018). Dis Colon Rectum 2018; 61:755-774. [PMID: 29878949 DOI: 10.1097/dcr.0000000000001114] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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16
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Human papillomavirus-associated anal and cervical cancers in HIV-infected individuals: incidence and prevention in the antiretroviral therapy era. Curr Opin HIV AIDS 2017; 12:26-30. [PMID: 27828801 DOI: 10.1097/coh.0000000000000336] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW The incidence of human papillomavirus (HPV)-related cancers has increased (anal cancer) or not declined (cervical cancer) since the introduction of antiretroviral therapy (ART). This article reviews recent data on incidence and prevention efforts for HPV-related cancers in the ART era. RECENT FINDINGS ART may confer some benefit with respect to reducing the risk of anal high-grade squamous intraepithelial lesion and cancer, but the degree of that benefit appears to be limited. The prevalence of anal HPV infection, anal high-grade squamous intraepithelial lesion, and anal cancer remain high among individuals on effective ART. The incidence of cervical cancer is high among HIV-infected women, particularly in countries wherein there are no organized cervical cancer prevention programmes. Efforts are in progress to define optimal screen-and-treat cervical cancer prevention programmes in different clinical settings and to define the efficacy of secondary prevention programmes for prevention of anal cancer. SUMMARY HPV-related cancers are likely to remain an important problem in HIV-infected men and women for the foreseeable future, even among those on effective ART.
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17
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Berry-Lawhorn JM, Palefsky JM. Progression of anal high-grade squamous intraepithelial lesions to anal squamous cell carcinoma and clinical management of anal superficially invasive squamous cell carcinoma. SEMINARS IN COLON AND RECTAL SURGERY 2017. [DOI: 10.1053/j.scrs.2017.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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