Ichthyosis

(ik-the-o’ ’-sis) [ix^vg, fish]. A chronic skin-disease characterized by the development of epidermal plates somewhat resembling the scales of a fish. I. hystrix, a form characterized by warty growths, consisting of elongated and hypertrophied papillae, covered by greatly thickened epidermis. I. simplex, the common form of ichthyosis, in which the surface has a te elated appearance, from being covered with large, finely corrugated, papery scales. 326