Case Letter
Acyclovir-resistant chronic mucocutaneous herpes with good response to the association with imiquimod in an AIDS patient: case report
Suellen Ramos de Oliveira
, Ariane Sponchiado Assoni, Thiago Jeunon de Sousa Vargas, Egon Daxbacher
Corresponding author
Hospital Federal de Bonsucesso, Rio de Janeiro, RJ, Brazil
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Among the laboratory alterations, she had a CD4 T-cell count of 4 cells/μL. She reported the presence of ulcerated anogenital lesions for approximately one year. She had been medicated at another service with oral acyclovir for four months, without any improvement.</p><p id="par0025" class="elsevierStylePara elsevierViewall">At the time of the examination, she had extensive, intensely painful, ulcerated lesions with crusts in the vulva and perianal region (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>a). Intravenous acyclovir was the drug of choice, at a dose of 10 mg/kg/dose 3 times a day, associated with 5% imiquimod cream (3 times/week), with excellent tolerability. She showed a good therapeutic response three weeks after beginning the proposed treatment (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>b), but it could not be concluded as the patient died due to complications from the underlying disease. The histopathological examination was carried out at the beginning of the clinical picture in order to document the case, showing the typical findings of HSV infection (<a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2</a>).</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0030" class="elsevierStylePara elsevierViewall">It is believed that unusual clinical presentations due to HSV infections in AIDS patients could be explained as a reflection of the slow evolution of the disease and not necessarily due to the specific characteristics of the involved strains.</p><p id="par0035" class="elsevierStylePara elsevierViewall">Imiquimod is an immunomodulator with a formal indication for the topical treatment of conditions such as external anogenital warts, superficial basal cell carcinoma, and actinic keratoses.<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> Its action is due to its antiviral and antitumor effects.<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> Although not considered a formal indication of this medication, the antiproliferative action of imiquimod has shown significant importance in the adjuvant treatment of genital ulcers caused by HSV, particularly those refractory to conventional treatment, such as in our patient, who had already been treated with long-term oral acyclovir.</p><p id="par0040" class="elsevierStylePara elsevierViewall">There is a report in the literature, as early as 2002, indicating the successful use of topical imiquimod for the treatment of genital ulcers in an HIV-positive patient.<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> More recently, two other cases have been reported, both presenting clinical resistance to conventional antiviral treatment, which had excellent results with the association of topical imiquimod.<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> There are descriptions in the literature of significant improvement of the lesions after the sixth day of use of the association of imiquimod with the traditional treatment.<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Foscarnet sodium, in cases of ulcers that are resistant to acyclovir, has been the drug of choice for the associated treatment. However, it is known that there are drug-resistant strains that replicate even during its use.<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a> Despite not having undergone a viral resistance test to acyclovir, the patient in the present case report had been submitted to monotherapy with this medication for months without any improvement. Studies of resistance patterns of HSV to different antiviral agents used in daily practice and the characterization of mutant strains of HSV have shown that resistance is due to loss or modification of the viral enzyme thymidine kinase or changes in viral DNA polymerase.<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> Based on the promising results of the association of topical imiquimod with the established antiviral therapy, including cases that were not submitted to drug susceptibility testing, the combination therapy was chosen. It is believed that the improvement in local immunity provided by imiquimod would explain the clinical improvement of the lesions, as the increase in interferon alpha plays an important role in controlling viral infections.<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> Considering the relatively rapid response to the proposed treatment, the hypothesis that this would not be a case of drug resistance, but refractoriness to the treatment due to deficient local immunity in a patient with AIDS is supported.</p><p id="par0050" class="elsevierStylePara elsevierViewall">There have been reported cases of occlusion therapy with this topical drug, a technique that is usually not well accepted by patients due to local side effects. However, a study was published in which the patient showed an excellent result and no side effects, with complete regression of the lesion after 10 weeks of imiquimod use.<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">Finally, it is important to emphasize that lesions with unusual presentations can make the diagnosis of HSV difficult. The main therapeutic regimen remains the use of acyclovir, but in patients with immunodeficiency, the association of the antiviral and the topical use of imiquimod has shown good results. Although further studies are still required, the case reported herein may help to support the use of imiquimod as a promising drug in the treatment of genital infections caused by HSV refractory to the traditional therapy.</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Financial support</span><p id="par0060" class="elsevierStylePara elsevierViewall">None declared.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Authors’ contributions</span><p id="par0065" class="elsevierStylePara elsevierViewall">Suellen Ramos de Oliveira: Concepts; design; definition of intellectual content; literature search; clinical studies; data acquisition; data analysis; manuscript preparation; manuscript editing; manuscript review; guarantor.</p><p id="par0070" class="elsevierStylePara elsevierViewall">Ariane Sponchiado Assoni: Concepts; design; definition of intellectual content; literature search; clinical studies; data acquisition; manuscript preparation; manuscript editing; guarantor.</p><p id="par0075" class="elsevierStylePara elsevierViewall">Thiago Jeunon de Sousa Vargas: Concepts; design; definition of intellectual content; clinical studies; data analysis; manuscript review; guarantor.</p><p id="par0080" class="elsevierStylePara elsevierViewall">Egon Daxbacher: Concepts; design; definition of intellectual content; clinical studies; data analysis; manuscript review; guarantor.</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Conflicts of interest</span><p id="par0085" class="elsevierStylePara elsevierViewall">None declared.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:4 [ 0 => array:2 [ "identificador" => "sec0005" "titulo" => "Financial support" ] 1 => array:2 [ "identificador" => "sec0010" "titulo" => "Authors’ contributions" ] 2 => array:2 [ "identificador" => "sec0015" "titulo" => "Conflicts of interest" ] 3 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2020-08-18" "fechaAceptado" => "2020-10-13" "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "⋆" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Study conducted at the Hospital Federal Bonsucesso, Rio de Janeiro, RJ, Brazil.</p>" ] ] "multimedia" => array:2 [ 0 => array:8 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1011 "Ancho" => 1474 "Tamanyo" => 169676 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at0005" "detalle" => "Figure " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">(A), Extensive ulcer with crusts in the vulva. (B), Cicatricial aspect of the lesion after association with 5% imiquimod cream.</p>" ] ] 1 => array:8 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 661 "Ancho" => 905 "Tamanyo" => 176417 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at0010" "detalle" => "Figure " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Cytopathic effects of herpes simplex such as ballooning degeneration of keratinocytes, marginalized chromatin, multinucleated giant cells (Hematoxylin & eosin, ×400).</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:10 [ 0 => array:3 [ "identificador" => "bib0005" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Recalcitrant hypertrophic herpes genitalis in HIV-infected patient successfully treated with topical imiquimod" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "S. 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| Year/Month | Html | Total | |
|---|---|---|---|
| 2024 November | 13 | 9 | 22 |
| 2024 October | 153 | 69 | 222 |
| 2024 September | 172 | 104 | 276 |
| 2024 August | 174 | 123 | 297 |
| 2024 July | 159 | 119 | 278 |
| 2024 June | 140 | 81 | 221 |
| 2024 May | 111 | 67 | 178 |
| 2024 April | 106 | 92 | 198 |
| 2024 March | 77 | 97 | 174 |
| 2024 February | 101 | 84 | 185 |
| 2024 January | 66 | 63 | 129 |
| 2023 December | 68 | 63 | 131 |
| 2023 November | 94 | 91 | 185 |
| 2023 October | 81 | 88 | 169 |
| 2023 September | 95 | 82 | 177 |
| 2023 August | 76 | 39 | 115 |
| 2023 July | 99 | 47 | 146 |
| 2023 June | 78 | 36 | 114 |
| 2023 May | 150 | 26 | 176 |
| 2023 April | 79 | 11 | 90 |
| 2023 March | 87 | 50 | 137 |
| 2023 February | 76 | 32 | 108 |
| 2023 January | 81 | 57 | 138 |
| 2022 December | 76 | 36 | 112 |
| 2022 November | 112 | 54 | 166 |
| 2022 October | 124 | 60 | 184 |
| 2022 September | 71 | 65 | 136 |
| 2022 August | 62 | 60 | 122 |
| 2022 July | 77 | 63 | 140 |
| 2022 June | 100 | 74 | 174 |
| 2022 May | 136 | 65 | 201 |
| 2022 April | 125 | 88 | 213 |
| 2022 March | 142 | 104 | 246 |
| 2022 February | 44 | 43 | 87 |
| 2022 January | 29 | 48 | 77 |
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