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Erythema Multiforme Major
Definition 1
A severe, sometimes life-threatening, form of erythema multiforme. It is considered to be a hypersensitivity skin reaction triggered by a variety of stimuli, including infections and medication. It is characterized by raised, edematous papules in the extremities; involvement of one or more mucous membranes; and epidermal detachment involving less than ten percent of the total body surface area. (NCI Thesaurus)
Definition 2
A variant of bullous erythema multiforme. It ranges from mild skin and mucous membrane lesions to a severe, sometimes fatal systemic disorder. Ocular symptoms include ulcerative conjunctivitis, keratitis, iritis, uveitis, and sometimes blindness. The cause of the disease is unknown. (NLM, Medical Subject Headings)
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