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Ichthyosis (also named fish scale disease) [1] is a family of genetic skin disorders characterized by dry, thickened, scaly skin. [2] The more than 20 types of ichthyosis range in severity of symptoms, outward appearance, underlying genetic cause and mode of inheritance (e.g., dominant, recessive, autosomal or X-linked). [3]
A child with Harlequin-type ichthyosis. Visible plates on the skin and changes in the appearance of the ears and fingers, are symptoms of Harlequin-type ichthyosis. [10] Newborns with harlequin-type ichthyosis present with thick, fissured armor-plate hyperkeratosis. [11] Sufferers feature severe cranial and facial deformities.
Lamellar ichthyosis, also known as ichthyosis lamellaris and nonbullous congenital ichthyosis, is a rare inherited skin disorder, affecting around 1 in 600,000 people. Presentation [ edit ]
Eclabium (eversion of the lips), ectropion and alopecia (hair loss) are more common in congenital ichthyosiform erythroderma than in lamellar ichthyosis. [ 3 ] [ non-primary source needed ] Congenital ichthyosiform erythroderma can present very similarly to lamellar ichthyosis and they often share characteristics, though the two conditions can ...
Epidermolytic ichthyosis (EI), [a] is a severe form of dry scaly skin, that initially presents with redness, blisters, erosions, and peeling in a newborn baby. [ 5 ] [ 6 ] Hyperkeratosis typically develops several months later. [ 6 ]
Ichthyosis en confetti, is a very rare form of congenital ichthyosis in which healthy patches of normal skin co-exist within the abnormal skin areas. [2] The condition is caused by a frameshift mutation in the keratin 10 gene (KRT10); [3] mutant keratin 10 accumulates in the nucleolus, a sub-nuclear structure, rather than within cellular intermediate filaments like the wild-type protein.
Ichthyosis bullosa of Siemens is a type of familial, autosomal dominant ichthyosis, a rare skin disorder. [1]: 491 It is also known as bullous congenital ichthyosiform erythroderma of Siemens or ichthyosis exfoliativa. It is a genetic disorder with no known cure which is estimated to affect about 1 in 500,000 people. [2]
X-linked ichthyosis (abbreviated XLI) is a skin condition caused by the hereditary deficiency of the steroid sulfatase (STS) enzyme that affects 1 in 2000 to 1 in 6000 males. [2] XLI manifests with dry, scaly skin [ 3 ] and is due to deletions [ 4 ] [ 5 ] or mutations [ 6 ] in the STS gene.