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  • Title: A case of autoimmune bullous dermatosis with features of pemphigus vulgaris and bullous pemphigoid.
    Author: Kore-eda S, Horiguchi Y, Ohtoshi E, Tanaka T, Fujii K, Okamoto H, Ikai K, Imamura S.
    Journal: Am J Dermatopathol; 1995 Oct; 17(5):511-6. PubMed ID: 8599459.
    Abstract:
    Pleomorphic blisters, including tense bullae and annularly arranged vesicles around the erythema as well as erosive eruptions in the oral cavity, appeared on a 61-year-old woman 5 years after surgery for cholangiocellular carcinoma. A biopsy specimen from the oral cavity showed intraepidermal blisters, and those from skin lesions showed subepidermal blisters with infiltrates of eosinophils and neutrophils. The early-stage vesicles showed infiltrates along the epidermal-dermal junction, where electron microscopy disclosed disruption of the lamina densa, basal cells remaining on the dermis, and acantholytic keratinocytes among the infiltrates, but there was no cleavage of the epidermal-dermal junction at the lamina lucida. Direct immunofluorescence studies showed immune deposition at the intercellular space (ICS) and along the basement membrane zone (BMZ). Indirect immunofluorescence studies confirmed coexistence of IgG class anti-ICS and anti-BMZ antibodies. Although this case showed immunohistochemical features of bullous pemphigoid, the presence of suprabasal cleavage in the oral mucosa, acantholytic cells in the blister cavity, the deposition of IgG at the ICS of the perilesional epidermis, and circulating anti-ICS antibodies strongly suggested that this case was primarily pemphigus. The strong inflammation along the epidermal-dermal junction due to unknown factors may have modified the clinical appearance and the histopathology.
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