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[Bullous dermatosis with conjunctival and corneal involvement: differential diagnostic scope and explanation of the "overlap syndrome" concept].

Chronic blister-forming dermatosis can lead to conjunctival and corneal involvement. Taking one such case as an example, the authors show that while disorders of this kind can be classified as a form of bullous dermatosis, the differential diagnostic classification is not unequivocal, regardless of the examination method adopted. The term "overlay syndrome" has been introduced into the dermatologic literature to cover clinical pictures of this kind.