High Quality Content by WIKIPEDIA articles! Stevens Johnson syndrome (SJS) is a life-threatening condition affecting the skin in which cell death causes the epidermis to separate from the dermis. The syndrome is thought to be a hypersensitivity complex affecting the skin and the mucous membranes. Although the majority of cases are idiopathic, the main class of known causes is medications, followed by infections and (rarely) cancers. There is agreement in the medical literature that Stevens Johnson syndrome (SJS) can be considered a milder form of toxic epidermal necrolysis (TEN). These conditions were first recognised in 1922.