Mild forms of<unk>  should be diagnosable from appearance and patient history alone. Severe cases are hard to distinguish from mild epidermolytic hyperkeratosis. A skin biopsy shows a characteristic damaged layer in the upper spinous level of the skin. It may be difficult to distinguish from epidermolytic hyperkeratosis. The gene causing<unk>  is known and so a diagnosis can be confirmed by genetic testing.
Ichthyosis bullosa of Siemens
Phytophotodermatitis
Granuloma faciale
Erythrokeratodermia variabilis
Ichthyosis acquisita
Aromaticum rosatum
Rubeosis iridis
Poikiloderma of Civatte