Deep Learning and High-Resolution Anoscopy: Development of an Interoperable Algorithm for the Detection and Differentiation of Anal Squamous Cell Carcinoma Precursors-A Multicentric Study.

High-resolution anoscopy (HRA) plays a central role in the detection and treatment of precursors of anal squamous cell carcinoma (ASCC). Artificial intelligence (AI) algorithms have shown high levels of efficiency in detecting and differentiating HSIL from low-grade squamous intraepithelial lesions (LSIL) in HRA images. Our aim was to develop a deep learning system for the automatic detection and differentiation of HSIL versus LSIL using HRA images from both conventional and digital proctoscopes. A convolutional neural network (CNN) was developed based on 151 HRA exams performed at two volume centers using conventional and digital HRA systems. A total of 57,822 images were included, 28,874 images containing HSIL and 28,948 LSIL. Partial subanalyses were performed to evaluate the performance of the CNN in the subset of images acetic acid and lugol iodine staining and after treatment of the anal canal. The overall accuracy of the CNN in distinguishing HSIL from LSIL during the testing stage was 94.6%. The algorithm had an overall sensitivity and specificity of 93.6% and 95.7%, respectively (AUC 0.97). For staining with acetic acid, HSIL was differentiated from LSIL with an overall accuracy of 96.4%, while for lugol and after therapeutic manipulation, these values were 96.6% and 99.3%, respectively. The introduction of AI algorithms to HRA may enhance the early diagnosis of ASCC precursors, and this system was shown to perform adequately across conventional and digital HRA interfaces.

Perianal fistulizing Crohn's disease is associated with a higher prevalence of HPV in the anorectal fistula tract. A comparative study.

BACKGROUND & AIMS: Perianal fistulizing Crohn's disease is the main risk factor for anal cancer in patients with inflammatory bowel disease. Whether this occurs due to a higher frequency of human papillomavirus remains unclear. The authors aimed to evaluate the prevalence of HPV and high-risk HPV in patients with perianal Crohn's disease, compared with a control group. METHODS: The authors conducted a two-center cross-sectional study in which perianal fistulizing Crohn's disease patients were matched for age and sex with patients with anorectal fistula without Crohn's disease. Biopsy specimens were obtained from fistulous tracts during examination under anesthesia for both groups. The samples were sent for HPV detection and genotyping using the INNO-LiPA test. RESULTS: A total of 108 subjects (54 in each group) were recruited. The perianal fistulizing Crohn's disease group showed a statistically higher frequency of HPV in the fistulous tract than the control group (33.3% vs. 16.7%; p = 0.046). Separate analyses on high-risk types demonstrated that there was a numerically higher frequency of HPV in the perianal fistulizing Crohn's disease group. In multiple logistic regression, patients with perianal fistulizing Crohn's disease were found to have a chance of HPV 3.29 times higher than patients without Crohn's disease (OR = 3.29; 95% CI 1.20‒9.01), regardless of other variables. The types most frequently identified in the perianal fistulizing Crohn's disease group were HPV 11 (12.96%) and HPV 16 (9.26%). CONCLUSION: Perianal fistulizing Crohn's disease is associated with a higher prevalence of HPV than in patients with anorectal fistula without Crohn's disease.

Perianal fistulizing Crohn's disease is associated with a higher prevalence of HPV in the anorectal fistula tract. A comparative study

Abstract Background & Aims Perianal fistulizing Crohn's disease is the main risk factor for anal cancer in patients with inflammatory bowel disease. Whether this occurs due to a higher frequency of human papillomavirus remains unclear. The authors aimed to evaluate the prevalence of HPV and high-risk HPV in patients with perianal Crohn's disease, compared with a control group. Methods The authors conducted a two-center cross-sectional study in which perianal fistulizing Crohn's disease patients were matched for age and sex with patients with anorectal fistula without Crohn's disease. Biopsy specimens were obtained from fistulous tracts during examination under anesthesia for both groups. The samples were sent for HPV detection and genotyping using the INNO-LiPA test. Results A total of 108 subjects (54 in each group) were recruited. The perianal fistulizing Crohn's disease group showed a statistically higher frequency of HPV in the fistulous tract than the control group (33.3% vs. 16.7%; p = 0.046). Separate analyses on high-risk types demonstrated that there was a numerically higher frequency of HPV in the perianal fistulizing Crohn's disease group. In multiple logistic regression, patients with perianal fistulizing Crohn's disease were found to have a chance of HPV 3.29 times higher than patients without Crohn's disease (OR = 3.29; 95% CI 1.20‒9.01), regardless of other variables. The types most frequently identified in the perianal fistulizing Crohn's disease group were HPV 11 (12.96%) and HPV 16 (9.26%). Conclusion Perianal fistulizing Crohn's disease is associated with a higher prevalence of HPV than in patients with anorectal fistula without Crohn's disease.

Comparative analysis of anal colposcopy with histology in the follow-up of patients under treatment for anal condyloma

Objectives: To compare morphological abnormalities on anal colposcopy against histology to determine anal high-grade squamous intraepithelial lesions (HSILs). Methods: This is a retrospective data assessment of HIV-negative and HIV-positive patients undergoing outpatient follow-up. The sample comprised 54 patients presenting acetowhite lesions on anal colposcopy. Acetowhite lesions were classified according to their morphology into punctation, verrucous, mosaic, ulcerated, or hypervascularized, and biopsies of these specimens were classified as anal HSIL, low-grade squamous intraepithelial lesion (LSIL), or normal. The data were analyzed using SPSS forWindows version 13.0 (SPSS Inc., Chicago, IL, USA). The results were analyzed using the nonparametric Mann-Whitney test, the Fisher exact test and the chi-squared parametric test. A 95% confidence interval (CI) was used and a level of significance <5% was adopted for all statistical tests. Results Fifty-four patients (50 males, 80% HIV+) with biopsied acetowhite lesions were assessed. There were 31 punctation lesions, 1 classified as HSIL (3.2%; 95%CI: 0- 40.0), 17 verrucous lesions, 3 HSIL (17.7%; 95%CI: 0-10.7), and 1 ulcerated, classified as HSIL (100%), and 4 mosaic and 1 atypical vessel lesion, all classified as LSIL. The results showed no association of presence of anal HSIL with positivity for HIV infection or with counts above or below 500/µl in HIV+patients. Statistical analysis was performed using the Mann-Whitney nonparametric test, the Fisher exact test, and the chi-squared parametric test. Conclusion: The comparison of morphological findings on anal colposcopy against histology revealed no morphological pattern suggesting anal HSIL. (AU)

Analyzing the prevalence of proctological diseases in HIV-positive and -negative patients / Análise da prevalência de doenças proctológicas em pacientes HIV positivo e negativo

ABSTRACT Objective: To compare proctological diseases in HIV-positive and -negative patients. Method: Prospective study conducted in the proctology outpatient clinic at Instituto de Infectologia Emílio Ribas from 2013 through 2019. All of them underwent anamnesis and proctological examination and were divided into two groups (HIV+ and HIV−). The groups were then compared with regard to age, sex, diagnosis, and whether or not there was any indication for surgery. Results: 485 HIV + patients (41.9%) (Group I) and 672 HIV− (58.1%) (Group II). The mean age in Group I was 42.8 years, and 404 (83.3%) of the patients were males. In Group II, the mean age was 48.3 years, and 396 (59%) patients were females. In comparing the groups, a statistically significant difference was found regarding sex, age, and diagnosis. The incidence of hemorrhoid and anal skin tags was higher in group II and that of condyloma acuminata was higher in in Group I (p < 0.001). In Group I, condyloma acuminata was more prevalent, but in those with CD4 levels above 500 cells/mm3, the diagnoses were more similar to those in the population without HIV. Conclusions: Proctological diseases were found to be similar but have different incidences. The incidences of diseases in HIV− and + patients tend to approach each other as CD4 level increases.

RESUMO Objetivo: Comparar as doenças proctológicas nos pacientes HIV positivos e negativos. Método: Estudo prospectivo realizado no ambulatório de proctologia do Instituto de Infectologia Emílio Ribas de 2013 a 2019. Todos foram submetidos a anamnese e exame proctológico, e divididos em dois grupos (HIV+ e HIV−) sendo comparados em relação a idade, sexo, diagnóstico e se havia ou não indicação cirúrgica. Resultados: 485 pacientes HIV+ (41.9%) (Grupo I) e 672 HIV negativos (58.1%) (Grupo II). A média de idade do Grupo I foi 42.8 anos sendo 404 (83.3%) do masculino. No grupo II, a média de idade foi de 48.3 anos, sendo 396 (59%) do sexo feminino. Comparando os grupos, houve diferença estatisticamente significante em relação ao sexo, idade e diagnóstico. Houve maior incidência de hemorróida e plicoma no Grupo II e condilomas acuminados no Grupo I (p < 0.001). No Grupo I, o condiloma acuminado foi mais prevalente, porém naqueles com CD4 acima de 500 células/mm3, os diagnósticos se aproximaram da população sem HIV. Conclusão: As doenças proctológicas foram semelhantes, com incidências diferentes. A incidências das doenças de pacientes HIV− e + tendem a se aproximar na medida que o nível do CD4 aumenta.

Comparison between anal cytology, high-resolution anoscopy and HPV DNA genotyping by polymerase chain reaction in the post-treatment follow-up of condylomata acuminata.

AIM: to evaluate the presence of subclinical HPV-induced anal lesions with anal cytology, High-Resolution Anoscopy (HRA) and HPV genotyping by polymerase chain reaction (PCR) in the follow-up of treated condylomata acuminata (CA). METHODS: seventy-nine male patients were included. One month after anal CA eradication, the patients underwent brush samples collection for anal cytology and PCR, and HRA with biopsy of acetowhite lesions. These methods were compared within all patients and between groups, according to Human Immunodeficiency Virus (HIV) infection status: HIV-negative; HIV-positive with TCD4 count above and below 350 cells/mm3. RESULTS: the most frequent HPV types were 6 and 16. HPV DNA was isolated in 92%. HIV infection was associated with a higher number of oncogenic HPV types (p=0.038). All patients with negative PCR had negative HRA and cytology. There were no differences in cytological, HRA or histopathological findings between groups. CONCLUSION: the association of the findings of cytopathology, HRA and genotyping of HPV refined the diagnosis of HPV-induced lesions. The degree of immunodeficiency was not associated with increase in remnant HPV-induced anal lesions.

Tumor de Buschke-Lowenstein perianal: relato de dois casos tratados com podofilina em vaselina sólida 25% / Perianal Buschke-Lowenstein tumor: report of two cases treated with 25% podophyllin ointment

O tumor de Buschke-Lowenstein (TBL) é variante extremamente rara do condiloma acuminado que, apesar de manifestar-se clinicamente por lesões de grandes proporções, apresenta comportamento biológico e características histológicas benignas. Existem diversas abordagens terapêuticas disponíveis, muitas delas apoiando-se em abordagens cirúrgicas extensas e mutilantes. Apresentamos dois casos de pacientes com TBL tratados com podofilina tópica, cujas respostas terapêuticas foram extremamente favoráveis em ambos os casos.

Buschke-Lowenstein tumor (BLT) is an extremely rare variant of condylomata acuminata that despite being clinically presented by large lesions, presents a benign biological behavior and histological characteristics. There are a number of therapeutic approaches available, many of which rely on extensive and mutilating surgical procedures. We present two cases of patients with BLT treated with topical podophyllin whose therapeutic responses were extremely favorable in both cases.

Comparison between anal cytology, high-resolution anoscopy and HPV DNA genotyping by polymerase chain reaction in the post-treatment follow-up of condylomata acuminata / Comparação entre citologia anal, colposcopia anal e genotipagem do HPV por reação em cadeia da polimerase no seguimento pós-operatório de condiloma acuminado

ABSTRACT Aim: to evaluate the presence of subclinical HPV-induced anal lesions with anal cytology, High-Resolution Anoscopy (HRA) and HPV genotyping by polymerase chain reaction (PCR) in the follow-up of treated condylomata acuminata (CA). Methods: seventy-nine male patients were included. One month after anal CA eradication, the patients underwent brush samples collection for anal cytology and PCR, and HRA with biopsy of acetowhite lesions. These methods were compared within all patients and between groups, according to Human Immunodeficiency Virus (HIV) infection status: HIV-negative; HIV-positive with TCD4 count above and below 350 cells/mm3. Results: the most frequent HPV types were 6 and 16. HPV DNA was isolated in 92%. HIV infection was associated with a higher number of oncogenic HPV types (p=0.038). All patients with negative PCR had negative HRA and cytology. There were no differences in cytological, HRA or histopathological findings between groups. Conclusion: the association of the findings of cytopathology, HRA and genotyping of HPV refined the diagnosis of HPV-induced lesions. The degree of immunodeficiency was not associated with increase in remnant HPV-induced anal lesions.

RESUMO Objetivo: avaliar a presença de lesões anais subclínicas HPV-induzidas com citologia anal, colposcopia anal e genotipagem de HPV por reação em cadeia da polimerase (PCR) no seguimento de condilomas anais tratados. Método: foram incluídos 79 pacientes do sexo masculino. Após um mês da erradicação de lesões condilomatosas anais, os participantes voltaram em consulta para coleta de amostras com escova para citologia anal e PCR, e colposcopia anal com biópsia de lesões acetobrancas. Os métodos de detecção das lesões foram comparados entre os pacientes e entre grupos, de acordo com o status de infecção pelo vírus da imunodeficiência humana (HIV): HIV-negativo; HIV-positivo com TCD4 acima ou abaixo de 350 células/mm3. Resultados: os tipos de HPV mais frequentes foram 6 e 16. Infecção pelo HIV foi associada a maior número de tipos de HPV oncogênicos (p=0,038). Todos os pacientes com PCR negativo apresentaram colposcopia e citologia negativos. Não houve diferença nos achados citológico, colposcópico ou histopatológico entre grupos. Conclusão: a associação dos achados citopatológico, colposcópico e PCR melhorou a acurácia do diagnóstico de lesões anais HPV-induzidas. O grau de imunodeficiência não foi associado a maior frequência de lesões anais HPV-induzidas remanescentes.

Giant condyloma acuminatum: report of surgical treatment and evolution of healing / Condiloma acuminado gigante: relato de tratamento cirúrgico e evolução da cicatrização

O condiloma acuminado gigante, variante rara do condiloma acuminado anogenital, apresenta crescimento rápido associado a estados de imunodeficiência.Relatamos os resultados com os cuidados com a ferida operatória. Trata-se de homem de etnia negra, 55 anos, portador do vírus da imunodeficiência humana com condiloma acuminado acometendo desde as regiões inguinais até o sulco interglúteo, que foi ressecado permanecendo a ferida aberta para posterior enxertia. Os cuidados com essa ferida incluíram solução de polihexametileno biguanida/betaína, solução de ácidos graxos essenciais, hidrofibra/prata e película. Evoluiu com infecção secundária sendo a hidrofibra substituída por espuma de poliuretano/prata/ibuprofeno. Houve melhora da infecção e da dor, contração das bordas e presença de tecido de granulação em toda a lesão. Naquelas condições, o enxerto de pele foi realizado no 41º dia. A despeito dos possíveis vieses de confusão, pode-se inferir que esses cuidados prepararam o leito da ferida para receber o enxerto de pele.

Giant condyloma acuminatum, a rare variant of anogenital condyloma, shows rapid growth associated with immunodeficiency. Wound care after resection andoutcomes were reported. NGS, black, 55 years, HIV positive, with giant condyloma acuminatum affecting from the groin to the intergluteal groove, which wasresected, remaining the wound opened for later skin graft. Topical care included polihexametilene biguanide/betaine solution, essencial fatty acids solution,hydrofiber/silver, and poliuretane film. The wound developed secondary infection, so hidrofiber was replaced by polyurethane foam/silver/ibuprofen. Therewas improvement in infection and pain, contraction of the edges and the presence of granulation tissue across the lesion. In those conditions the skin graft was performed after 41 days. Despite possible confusion bias, it can be inferred that the care adopted prepared the wound bed to receive the skin graft.

Local control of human papillomavirus infection after anal condylomata acuminata eradication.

OBJECTIVE: To verify whether the eradication of anal condylomata acuminata was effective for local control of HPV infection using anal colposcopy and anal brush cytology. METHODS: We evaluated 147 patients treated for anal margin and/or anal canal condyloma, with 108 HIV-positive and 39 HIV-negative individuals. The average age for males was 40 years for HIV-positive and 27.5 for HIV-negative. In females, the mean age was 37.5 years for HIV-positive and 31.5 for HIV-negative. RESULTS: Twenty-four patients (16.3%) had normal cytology and anal colposcopy, 16 (10.9%) normal cytology and altered anal colposcopy, 52 (35.4%) normal anal colposcopy and altered cytology, and 55 (37.4%) had altered cytology and anal colposcopy. CONCLUSION: the eradication of clinical lesions failed to locally control HPV infection.

Local control of human papillomavirus infection after anal condylomata acuminata eradication / Controle local da infecção perianal pelo papilomavirus humano após a erradicação dos condilomas acuminados

OBJECTIVE: To verify whether the eradication of anal condylomata acuminata was effective for local control of HPV infection using anal colposcopy and anal brush cytology. METHODS: We evaluated 147 patients treated for anal margin and/or anal canal condyloma, with 108 HIV-positive and 39 HIV-negative individuals. The average age for males was 40 years for HIV-positive and 27.5 for HIV-negative. In females, the mean age was 37.5 years for HIV-positive and 31.5 for HIV-negative. RESULTS: Twenty-four patients (16.3%) had normal cytology and anal colposcopy, 16 (10.9%) normal cytology and altered anal colposcopy, 52 (35.4%) normal anal colposcopy and altered cytology, and 55 (37.4%) had altered cytology and anal colposcopy. CONCLUSION: the eradication of clinical lesions failed to locally control HPV infection. .

OBJETIVO: verificar se a erradicação dos condilomas acuminados perianais foi efetiva no controle local da infecção pelo HPV, utilizando a colposcopia anal e a citologia anal com escova. MÉTODOS: avaliamos 147 pacientes tratados de condiloma da margem e/ou canal anal, sendo 108 HIV-positivos e 39 HIV-negativos. A média etária no sexo masculino foi 40 anos para os HIV-positivos e 27,5 anos para os HIV-negativos. No sexo feminino, a média etária foi 37,5 anos para os HIV positivos e 31,5 anos HIV-negativos. RESULTADOS: vinte e quatro pacientes (16,3%) apresentavam citologia e colposcopia normais, 16 (10,9%) citologia normal e colposcopia alterada, 52 (35,4%) citologia alterada e colposcopia normal e 55 (37,4%) citologia e colposcopia alteradas. CONCLUSÃO: a erradicação das lesões clínicas não controlou localmente a infecção pelo HPV. .

Genital warts: comparing clinical findings to dermatoscopic aspects, in vivo reflectance confocal features and histopathologic exam.

Genital warts can be diagnosed through physical examination and confirmed by histopathology. Noninvasive methods are useful for ruling out other diagnoses with no harm to the patient. In this study the clinical findings were compared to dermoscopy, reflectance confocal microscopy (RCM), and to histopathology findings, in order to determine possible patterns that can aid diagnosis of the lesion. It was possible to identify structural changes on reflectance confocal microscopy that are already known by dermoscopy, in addition to cellular changes previously seen only by histopathological examination. This study shows the use of reflectance confocal microscopy in cases of genital warts, providing important information that can be used in further studies.

Genital warts: comparing clinical findings to dermatoscopic aspects, in vivo reflectance confocal features and histopathologic exam

Genital warts can be diagnosed through physical examination and confirmed by histopathology. Noninvasive methods are useful for ruling out other diagnoses with no harm to the patient. In this study the clinical findings were compared to dermoscopy, reflectance confocal microscopy (RCM), and to histopathology findings, in order to determine possible patterns that can aid diagnosis of the lesion. It was possible to identify structural changes on reflectance confocal microscopy that are already known by dermoscopy, in addition to cellular changes previously seen only by histopathological examination. This study shows the use of reflectance confocal microscopy in cases of genital warts, providing important information that can be used in further studies.

Evaluation of Langerhans cells counts comparing HIV-positive and negative anal squamous cell-carcinoma patients.

PURPOSE: To investigate the differences in Langerhans cells (LCs) populations between HIV-positive and negative anal squamous cell carcinomas patients. METHODS: Twenty five patients (14 HIV-positive and 11 HIV-negative) were evaluated. Paraffin-block transversal thin sections from biopsies of anal squamous cell carcinomas (ASCC) were stained using the anti-CD1A antibody that identifies activated LCs. LCs counts were performed using histometry at 20 different sites, at baseline in the ASCC cases. These were then compared with LCs counts in anal canal specimens from HIV-negative and positive patients without ASCC (controls groups). RESULTS: In patients with ASCC, the LC count was greater among HIV-negative individuals than among HIV-positive individuals (p<0.05). The LC count was greater in the control HIV-negative group than in HIV-positive patients with ASCC (p<0.05). CONCLUSION: There was a lower amount of activated LCs in HIV-positive patients with anal squamous cell carcinomas than in HIV-negative patients, thereby suggesting worsening of the immune response.

Evaluation of Langerhans cells counts comparing HIV-positive and negative anal squamous cell-carcinoma patients / Avaliação das células de Langerhans no carcinoma espinocelular do canal anal em pacientes HIV-positivo e negativo

PURPOSE: To investigate the differences in Langerhans cells (LCs) populations between HIV-positive and negative anal squamous cell carcinomas patients. METHODS: Twenty five patients (14 HIV-positive and 11 HIV-negative) were evaluated. Paraffin-block transversal thin sections from biopsies of anal squamous cell carcinomas (ASCC) were stained using the anti-CD1A antibody that identifies activated LCs. LCs counts were performed using histometry at 20 different sites, at baseline in the ASCC cases. These were then compared with LCs counts in anal canal specimens from HIV-negative and positive patients without ASCC (controls groups). RESULTS: In patients with ASCC, the LC count was greater among HIV-negative individuals than among HIV-positive individuals (p<0.05). The LC count was greater in the control HIV-negative group than in HIV-positive patients with ASCC (p<0.05). CONCLUSION: There was a lower amount of activated LCs in HIV-positive patients with anal squamous cell carcinomas than in HIV-negative patients, thereby suggesting worsening of the immune response.

OBJETIVO: Comparar a quantidade de células de Langerhans (CL) em pacientes portadores do carcinoma espinocelular (CEC) do canal anal HIV-positivo e negativo. MÉTODOS: Avaliamos 25 pacientes, sendo 11 HIV-negativo e 14 HIV-positivo portadores do CEC do canal anal. Realizamos estudo com a coloração imunoistoquímica anti-CD1A para avaliar as CL ativadas. Utilizamos as lâminas coradas e pelo método da histometria contamos em 20 campos diferentes as células coradas na camada basal da lâmina própria, onde era evidente a disseminação tumoral. Realizamos dois grupos controles compostos por pacientes submetidos à biopsia anal sem neoplasia (sete pacientes HIV-negativo e quatro HIV-positivo). Comparamos as contagens de CL. RESULTADOS: A quantidade de CL foi superior nos pacientes portadores do CEC do canal anal soronegativo para o HIV, em relação aos soropositivos (p<0,05). A quantidade de CL foi superior no grupo controle HIV-negativo em relação ao grupo composto por pacientes soropositivos portadores do CEC do canal anal (p<0,05). CONCLUSÃO: Houve aumento das células de Langerhans ativadas na área peritumoral dos pacientes soropositivos para o HIV, o que sugere diminuição da resposta imune local.

Buschke -Loewenstein tumor: identification of HPV type 6 and 11.

The authors report a case of exuberant giant condyloma acuminatum of Buschke-Loewenstein in a male patient, slow-growing, progressive and with locally destructive behavior in the inguinal, body of the penis, scrotum, perineal and perianal regions. After surgery he showed no signs of recurrence in 20 months of follow-up. The identification of HPV types 6 and 11 was performed using in situ hybridization.

Sexually transmitted proctitis

Proctitis caused by sexually transmitted agents is usually taken for inflammatory bowel diseases, because of similar complaints, such as pain, bleeding and mucopurulent discharge, as well as the histopathology. Thus, its treatment is postponed and, sometimes, complications appear. The most common etiologic agents are Neisseria gonorrhoeae, Chlamydia trachomatis, Treponema pallidum and Herpes simplex. In order to avoid dissemination and complications, laboratory tests are essential for diagnosis and proper therapy. The objective of this article was to raise awareness to sexually transmitted diseases in proctitis etiology, as well as their diagnosis and treatment. (AU)

As retites provocadas por agentes sexualmente transmissíveis são frequentemente confundidas com doenças inflamatórias intestinais, uma vez que as queixas mais comuns, que incluem dor, sangramento e secreção mucopurulenta, e o padrão histopatológico são semelhantes. Dessa maneira, o tratamento é postergado e, algumas vezes, as complicações aparecem. Os agentes mais comuns incluem a Neisseria gonorrhoeae, a Chlamydia trachomatis, o Treponema pallidum e o Herpes simplex. Exames laboratoriais sensíveis e específicos para confirmação diagnóstica são essenciais para o tratamento correto, evitando a disseminação e as sequelas. O objetivo deste artigo foi chamar a atenção para as doenças sexualmente transmissíveis na etiologia das retites, bem como seu diagnóstico e tratamento. (AU)

Efficacy of topical imiquimod in HIV-positive patients with recurrent anal condylomata acuminata

INTRODUCTION: Imiquimod is a topical chemotherapic and immunostimulant agent with antitumoral and antiviral activities, used for anal condylomata acuminata treatment, mainly in recurrences. OBJECTIVE: Evaluate the imiquimod efficiency in chronic and recurrent anal condylomata acuminata in HIV-infected persons. METHOD: A prospective study that analyzed 61 patients with recurrent anal condylomata treated with topic 5% imiquimod, for at least 8 weeks. These patients had already been submitted to other topical and surgical treatments for anal warts. We evaluated the efficiency of this agent, through wart remission, with clinical examination and high-resolution anoscopy, CD4+ T lymphocyte count and side effects. The patients were 55 males and 6 females, from 22 to 63 years old. RESULTS: Remission was seen in 90%, being 46% complete remission and 44% partial remission. Other 10% did not respond to the treatment with imiquimod within the 16th week. Recurrences were observed in 11% of patients in 24-week follow-up. Statistics showed no differences in CD4+ T cell scores when groups with and without complete remission were compared. Adverse effects were reported by 45% of patients. They were mild to moderate burning (25%), intense burning (7%), ulcerative dermatitis (8%) and systemic symptoms (5%). CONCLUSION: Imiquimod was effective in controlling recurrent anal condylomata acuminata in HIV-positive patients, regardless of CD4+ T cell count. (AU)

INTRODUÇÃO: O imiquimode é agente tópico quimioterápico e imunoestimulante, com atividades antitumoral e antiviral, usado para tratamento dos condilomas acuminados perianais, principalmente os recidivantes. OBJETIVO: Avaliar a eficácia do imiquimode nos condilomas acuminados perianais crônicos e multirrecidivantes dos doentes soropositivos para o vírus da imunodeficiência adquirida (HIV). CASUÍSTICA E MÉTODO: Estudo clínico prospectivo por 12 meses em que observamos o uso tópico de imiquimode creme 5%, por no mínimo 8 semanas, em 61 portadores de condilomas acuminados perianais recidivantes e de difícil controle, e que já haviam sido submetidos a vários outros tratamentos clínicos e operatórios. Avaliamos a eficácia do produto quanto sua remissão (através de exame clínico e colposcópico), nível dos linfócitos T CD4+ e efeitos adversos. Foram 55 homens e 6 mulheres com idade entre 22 e 63 anos. RESULTADOS: Obtivemos 90% de remissão, sendo 46% de resposta completa, 44% de resposta parcial e 10% sem qualquer resposta em até 16 semanas de tratamento com imiquimode. A taxa de recidiva atingiu 11% em 24 semanas de seguimento. Quanto ao nível de linfócitos T CD4+, não observamos diferença estatística entre o grupo que atingiu remissão completa e o grupo que manteve lesões. Efeitos adversos foram relatados por 45% dos doentes, sendo ardor leve a moderado (25%), ardor intenso (7%), dermatite ulcerativa (8%) e efeitos sistêmicos (5%). CONCLUSÃO: O imiquimode foi efetivo no controle dos condilomas acuminados perianais recidivantes dos doentes HIV-positivo, independente da contagem sérica dos linfócitos T CD4+. (AU)

Buschke -Loewenstein tumor: identification of HPV type 6 and 11 / Condiloma acuminado gigante de Buschke-Lowenstein: identificação dos HPV 6 e 11

The authors report a case of exuberant giant condyloma acuminatum of Buschke-Loewenstein in a male patient, slow-growing, progressive and with locally destructive behavior in the inguinal, body of the penis, scrotum, perineal and perianal regions. After surgery he showed no signs of recurrence in 20 months of follow-up. The identification of HPV types 6 and 11 was performed using in situ hybridization.

Os autores relatam um caso exuberante de condiloma acuminado gigante de Buschke-Lowenstein, em paciente do sexo masculino, de crescimento lento e progressivo e de comportamento destrutivo das regiões inguinal, corpo do pênis, escroto, perineal e perianal. Após tratamento cirúrgico, não apresentou sinais de recidiva em 20 meses de seguimento. A identificação dos HPVs, tipos 6 e 11, foi realizada através da técnica de hibridização in situ.