Abstract
We studied by immunohistochemistry three cases of delayed envenomation by coelenterates. The most prominent features were the grouping of human leukocyte antigen–DR–positive cells with Langerhans cells (S-100 positive) and helper/inducer T lymphocytes (Leu-1 +, Leu-3 +, and Leu-4 +). This indicates the possibility of a type IV immunoreaction in the delayed cutaneous lesions caused by coelenterates.
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