15 reactions | Can you name some triggers for Stevens–Johnson syndrome? Stevens–Johnson syndrome and toxic epidermal necrolysis are acute, potentially fatal, type IV hypersensitivity reactions where cytotoxic T cells inappropriately attack and kill epithelial cells in the mucosa and skin epidermis. Learn more in the full video: https://osms.it/68018 #osmosis #medicine | Osmosis from Elsevier | Facebook