| ichthyosis vulgaris | most common form of ichthyosis characterised by prominent scaling especially on the exterior surfaces of the extremities. It is inherited as an autosomal dominant trait. (12 Dec 1998) |
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| ichthyosis, lamellar | A chronic, congenital ichthyosis inherited as an autosomal recessive trait. Infants are usually born encased in a collodion membrane which sheds within a few weeks. Scaling is generalised and marked with grayish-brown quadrilateral scales, adherent at their centres and free at the edges. In some cases, scales are so thick that they resemble armored plate. (12 Dec 1998) |
| ichthyosis, x-linked | Chronic form of ichthyosis that is inherited as a sex-linked recessive trait carried on the x-chromosome and transmitted to the male offspring. It is characterised by severe scaling, especially on the extremities, and is associated with steroid sulfatase deficiency. (12 Dec 1998) |