- Ichthyosis vulgaris is the most common of the ichthyoses. It shows autosomal dominant inheritance.
- Fine white scales develop on the trunk and extensor surfaces, usually within the first year of life, with fissuring in severe cases.
- Associated with atopy and keratosis pilaris.
- Mild to moderate compact hyperorthokeratosis
- Reduced and focally absent granular layer
- Dilatation of hair follicles
- Atrophy of sebaceous glands