scholarly journals The value of high-resolution anoscopy in the diagnosis of anal cancer precursor lesions in hiv-positive patients

2011 ◽  
Vol 48 (2) ◽  
pp. 136-145 ◽  
Author(s):  
Felicidad Gimenez ◽  
Ivan Tramujas da Costa-e-Silva ◽  
Adriana Daumas ◽  
José de Araújo ◽  
Sara Grigna Medeiros ◽  
...  

CONTEXT: Anal cancer, although a still rare disease, is being observed in ascending rates among some population segments known to be at risk for the development of the disease. Human papillomavirus (HPV) infection, immunodepression and anal intercourse are some factors associated with the development of the malignancy. Its similarities to cervical cancer have led to many studies aiming to establish guidelines for detecting and treating precursor lesions of anal cancer, with the goal of prevention. High-resolution anoscopy is routinely used for the diagnosis of anal cancer precursor lesions in many centers but the medical literature is still deficient concerning the role of this diagnostic modality. OBJECTIVES: To evaluate diagnostic validation and precision measures of high-resolution anoscopy in comparison to histopathological results of anal biopsies performed in HIV-positive patients treated at the Tropical Medicine Foundation of Amazonas, AM, Brazil. To observe any possible association between some risk factors for the development of anal cancer and the presence of anal squamous intraepithelial lesions. METHODS: A hundred and twenty-eight HIV-positive patients were submitted to anal canal cytological sampling for the detection of HPV infection by a PCR based method. High-resolution anoscopy was then performed after topical application of acetic acid 3% in the anal canal for 2 minutes. Eventual acetowhite lesions that were detected were recorded in respect to location, and classified by their tinctorial pattern, distribution aspect, relief, surface and vascular pattern. Biopsies of acetowhite lesions were performed under local anesthesia and the specimens sent to histopathological analysis. The patients were interviewed for the presence of anal cancer risk factors. RESULTS: The prevalences of anal HPV infection and of anal squamous intraepithelial lesions in the studied population were, respectively, 79% and 39.1%. High-resolution anoscopy showed sensibility of 90%, specificity of 19.23%, positive predictive value of 41.67%, negative predictive value of 75%, and a kappa coefficient of 0.076. From the analyzed lesions, high-grade squamous intraepithelial lesions was more frequently observed in association to dense (68%), flat (61%), smooth (61%), non-papillary (83%) and normal vascular pattern (70%) acetowhite lesions, while low-grade squamous intraepithelial lesions tended to be associated to dense (66%), flat-raised or raised (68%), granular (59%), non-papillary (62%) and normal vascular pattern (53%) acetowhite lesions. No statistical significance was observed as to the association of epidemiological characteristics and of most of the investigated anal cancer risk factors and presence of acetowhite lesions or anal squamous intraepithelial lesions. However, anal receptive sex and anal HPV infection were significantly associated to anal squamous intraepithelial lesions (P = 0.0493 and P = 0.006, respectively). CONCLUSION: High-resolution anoscopy demonstrated to be a sensitive, but not specific test for the detection of anal squamous intraepithelial lesions. Risk factors anal receptive sex and anal HPV infection were significantly associated to the presence of anal squamous intraepithelial lesions. Based on high-resolution anoscopy image data, acetowhite lesions relief and surface pattern were prone to distinguish between low-grade squamous intraepithelial lesions and high-grade squamous intraepithelial lesions.

2019 ◽  
Vol 32 (05) ◽  
pp. 347-357 ◽  
Author(s):  
Laura Svidler López ◽  
Luciana La Rosa

AbstractThis 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.


2019 ◽  
Vol 222 (1) ◽  
pp. 62-73 ◽  
Author(s):  
V W Jongen ◽  
O Richel ◽  
E Marra ◽  
M L Siegenbeek van Heukelom ◽  
A van Eeden ◽  
...  

Abstract Background Human immunodeficiency virus (HIV)–positive men who have sex with men (MSM) are at risk of anal squamous cell carcinoma. Data are limited on the natural history of the precursor to this carcinoma, anal squamous intraepithelial lesions (SILs). Methods HIV-positive MSM were screened for histopathological SILs by means of high-resolution anoscopy (HRA). For participants without SILs at baseline, we estimated the cumulative incidence and risk factors for SILs. For those with low-grade SILs (LSILs) at baseline, the risk of progression to high-grade SILs (HSILs) and the clearance rate were estimated at the lesion level. Results Of 807 men without SILs at baseline, 107 underwent follow-up HRA between 1 to 4.5 years later. At the second visit 18 men (16.8%) showed LSIL, and 25 (23.4%) HSIL. Age was associated with incident LSILs (adjusted odds ratio [aOR], 2.10 per 10-year increase in age; P = .01). Of 393 men with LSILs at baseline, 114 underwent follow-up HRA 0.5 to 2.5 years later. Of the 177 LSILs found at baseline, 87 (49.2%) had cleared at the second visit, and 29 (16.4%) had progressed to HSILs. Conclusion Incident LSILs and HSILs were common during follow-up among HIV-positive MSM without dysplasia at baseline. Among men with LSILs at baseline, nearly half of these lesions cleared, and a small portion progressed.


2010 ◽  
Vol 28 (15_suppl) ◽  
pp. 1598-1598
Author(s):  
T. Chalermchai ◽  
A. H. Li ◽  
J. Ananworanich ◽  
N. Teeratakulpisarn ◽  
W. Sathainthammawit ◽  
...  

2021 ◽  
Vol 17 (1) ◽  
pp. 45-52
Author(s):  
T.  S. Prisyazhnaya ◽  
V.   A. Mikhaylyukova ◽  
I.   V. Berlev ◽  
A.   V. Malek

Background. Infection with oncogenic types of human papillomavirus (HPV) is the leading cause of cervical cancer and its immediate precursors – squamous intraepithelial lesions. However, the persistence of HPV may not be sufficient for the occurrence of malignant transformation, and there may be other exogenous or endogenous factors that, in combination with the virus, increase the risk of developing and progressing cervical neoplasia.Objective: identification of risk factors that modulate the course of low-grade squamous intraepithelial lesions (LSIL) in women of reproductive age.Materials and methods. In 110 women aged 18 to 45 years with a diagnosis of LSIL, we evaluated the impact of risk factors (sexual behavior, reproductive function, contraceptive methods, smoking, HPV infection) on the course of the process (recovery, persistence or progression) during the 12-month follow-up period. HPV testing was performed by real-time PCR.Results. The average age of the study participants was 31.55 ± 7.17 years. Our observations showed that frequent artificial abortions, the practice of risky sexual behavior (early sexual debut, frequent change of sexual partners) increased the risk of persistence and progression of mild cervical cytological abnormalities. The use of oral contraceptives, barrier contraception and smoking did not affect the outcome of the disease.The prevalence of HPV among women with LSIL was 70.91 % (78/110). The predominant types were HPV 16 (35.45 %), HPV 33 (12.73 %) and HPV 18 (12.73 %). HPV 16 was more common in the progression group (62.50 %) than in the regression and persistence groups (14.63 % and 43.40 %, p <0.05). Progression of neoplasias was more often observed in patients with signs of multiinfection of the cervical epithelium with HPV. Single HPV infection was higher in the group of recovered women.Conclusions. The study found that a large number of induced abortions, the practice of risky sexual behavior, the presence of HPV type 16 and multiple HPV infection are factors contributing to the persistence of LSIL and progression to HSIL. These data may be useful for the management of women with mild cervical cytological abnormalities.


Sign in / Sign up

Export Citation Format

Share Document