Erythema MultiformeErythema Multiforme
Skin and mucous membranesSkin and mucous membranes
Immunologically mediatedImmunologically mediated
Triggered by: infective agents (eg. HSV), Triggered by: infective agents (eg. HSV),
drugs (sulphonamides, barbiturates), food drugs (sulphonamides, barbiturates), food
additives or chemical, immunizationadditives or chemical, immunization
( BCG,HBV)( BCG,HBV)
Oral lesions:Oral lesions: begins as erythematous begins as erythematous
areaareablisterblisterrupturesrupturesirregular painful irregular painful
ulcersulcers
Lips, buccal mucosa, tongue, soft palate, & Lips, buccal mucosa, tongue, soft palate, &
floor of mouth floor of mouth
Skin manifestations:Skin manifestations: erythematous, flat, erythematous, flat,
round macules, papules, or plaques, round macules, papules, or plaques,
usually in a symmetrical pattern- usually in a symmetrical pattern- target or target or
iris like lesionsiris like lesions
HPE & ImmunostainingHPE & Immunostaining
TreatmentTreatment:: supportive, systemic steroids supportive, systemic steroids