[2] It is caused by antibodies to type VII collagen within anchoring fibril structures located at the dermoepidermal junction in skin.

[2] It can appear similar to porphyria cutanea tarda, pemphigoid, pemphigus, dermatitis herpetiformis, or blistering drug eruption.

[2] It is caused by antibodies to type VII collagen within anchoring fibril structures located at the dermoepidermal junction in skin.

[3] Diagnosis is by observing the persistence of the condition, direct immunofluorescence, and detecting autoantibodies against type VII collagen.

[2] It can appear similar to porphyria cutanea tarda, pemphigoid, pemphigus, dermatitis herpetiformis, or blistering drug eruption.