Ichthyosis

Hereditary, rare, genetic, chronic disease, dry, rough skin, crocodile skin, dead skin flakes (squames).

Ichthyosis are skin diseases linked to various genetic anomalies affecting the structure or function of the skin.

They are characterised by very dry, rough skin with a scaly appearance on the skin surface, mainly on the trunk and certain parts of the limbs.

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It is caused by a genetic abnormality, usually appearing at or just after birth, and persisting throughout life¹. Depending on the gene involved, the severity of the disease and its clinical manifestations vary.

There are at least 50 different types of ichthyosis¹. The majority of patients have mild to moderate ichthyosis (<1% of the general population). Ichthyosis vulgaris is the most common, affecting 1 in 300 people, and is also the least severe.

1 - Vahlquist, A., & Törmä, H. (2020). Ichthyosis : Un modèle de route pour la recherche sur la peau. Acta Dermato Venereologica, 100(7), adv00097-206. https://doi.org/10.2340/00015555-3433