<unk>  is a family of genetic skin disorders characterized by dry, thickened, scaly skin. The more than 20 types of<unk>  range in severity of symptoms, outward appearance, underlying genetic cause and mode of inheritance (e.g., dominant, recessive, autosomal or X-linked).<unk>  comes from the Greek ἰχθύς ichthys, literally "fish", since dry, scaly skin is the defining feature of all forms of<unk> . The severity of symptoms can vary enormously, from the mildest, most common, types such as<unk>  vulgaris, which may be mistaken for normal dry skin, up to life-threatening conditions such as harlequin-type<unk> .<unk>  vulgaris accounts for more than 95% of cases.
Ichthyosis
Ocular melanosis
Band keratopathy
Lamellar ichthyosis
Ocular rosacea
Melasma
Bullous keratopathy
Erythrasma