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Bullae are elevated, fluid-filled blisters ≥ 10 mm in diameter.
The autoimmune bullous diseases include
Epidermolysis bullosa is a group of inherited diseases in which epithelial adhesion protein defects lead to epithelial fragility and bullae formation. Epidermolysis bullosa acquisita is a similar bullous disease thought to be autoimmune, but it is not inherited.
Other bullous conditions include staphylococcal scalded skin syndrome, toxic epidermal necrolysis, severe cellulitis, and certain drug eruptions.
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