It is caused by antibodies to type VII collagen within anchoring fibril structures located at the dermoepidermal junction in skin.
Epidermolysis bullosa acquisita
Epidermolysis bullosa simplex
Ichthyosis acquisita
Ichthyosis bullosa of Siemens
Junctional epidermolysis bullosa 
Epidermolysis bullosa dystrophica
Urticaria pigmentosa
Dermatopathia pigmentosa reticularis