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
