Abstract
Langerhans cells (LCs), specializing in antigen presentation, are a very important part of the skin immune system (SIS). Skin biopsies from 22 women with vulvar lichen sclerosus (LS): 15 patients with early and 7 with the late stage of the disease, were evaluated. Five women with vulvar squamous cell carcinoma (SCC) were also examined. The control group consisted of 9 women who underwent plastic surgery of the vulvar region. Immunohistochemical staining was performed on formalin-fixed paraffin-embedded tissues samples using antihuman CD1a antibody (NCL-CD1a-235, Novocastra). Increased numbers of LC stainings were present in early LS, whereas decreased numbers of these cells were present in late LS and in SCC compared with the control group. This study showed that dysregulation of the SIS may lead to suppression of LCs in the vulvar epithelium and may be one of the reasons for a higher tendency for carcinogenesis in the vulvar region.
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