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<p>Oral Kaposi sarcoma is a slowly progressing, HHV-8 related angioproliferative disorder strongly associated with immunosuppression. Regression can occur with treatment. We present a 49-year-old HIV-seronegative Caucasian male individual with two rapidly enlarging OKS lesions that spontaneously regressed and completely resolved without treatment after a few months. The individual was under treatment with valacyclovir for herpes simplex infection and was receiving emtricitabine/tenofovir for HIV pre-exposure prophylaxis. Only the mandibular lesion was biopsied, revealing classic endothelial spindle cell proliferation with formation of slit-like spaces and multiple newly formed vessels. Nuclear HHV-8 was immunohistochemically confirmed. Serologic tests prior to and after the development of OKS did not reveal HIV infection. Emtricitabine/tenofovir prophylactic treatment may have contributed to the remission and resolution.</p>

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Spontaneous Regression of Oral Kaposi Sarcoma in an HIV Negative Male

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • Isabella C. Galina,
  • Selenne Romero-Servin,
  • Kevin Arce,
  • Angela Rake,
  • Ioannis G. Koutlas

摘要

Oral Kaposi sarcoma is a slowly progressing, HHV-8 related angioproliferative disorder strongly associated with immunosuppression. Regression can occur with treatment. We present a 49-year-old HIV-seronegative Caucasian male individual with two rapidly enlarging OKS lesions that spontaneously regressed and completely resolved without treatment after a few months. The individual was under treatment with valacyclovir for herpes simplex infection and was receiving emtricitabine/tenofovir for HIV pre-exposure prophylaxis. Only the mandibular lesion was biopsied, revealing classic endothelial spindle cell proliferation with formation of slit-like spaces and multiple newly formed vessels. Nuclear HHV-8 was immunohistochemically confirmed. Serologic tests prior to and after the development of OKS did not reveal HIV infection. Emtricitabine/tenofovir prophylactic treatment may have contributed to the remission and resolution.