ichthyosis is a topic covered in the Taber's Medical Dictionary.

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(ĭk″thē-ō′sĭs )

[″ + osis, condition]
A condition in which the skin is dry and scaly, resembling fish skin. Because ichthyosis is so easily recognized, a variety of diseases have been called by this name.
A mild nonhereditary form is called winter itch. This is often seen on the legs of older patients, esp. during dry weather during the winter months. It may be more prevalent in those who bathe frequently, thus causing excessive dryness of the skin.

The application of lotions or ointments that soften and soothe the skin provide symptomatic relief for all forms of ichthyosis. Dry scales can be removed by applying a combination of 6% salicylic acid in a gel containing propylene glycol, ethyl alcohol, hydroxy propylene cellulose, and water. This is most effective when applied to moistened skin at night and covered with an occlusive dressing. Soaps should be used sparingly.

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