<unk>  is a rare disease, affecting fewer than 200,000 people in the United States.
Urticaria pigmentosa
Ichthyosis acquisita
Lamellar ichthyosis
Phytophotodermatitis
Ichthyosis bullosa of Siemens
Striate keratoderma
Dermatopathia pigmentosa reticularis
Ichthyosis vulgaris