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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.
A congenital deficiency in the enzyme is associated with X-linked ichthyosis, a scaly-skin disease affecting roughly 1 in every 2,000 to 6,000 males. [7] [8] The excessive skin scaling and hyperkeratosis is caused by a lack of breakdown and thus accumulation of cholesterol sulfate, a steroid that stabilizes cell membranes and adds cohesion, in the outer layers of the skin.
Multiple sulfatase deficiency (MSD), also known as Austin disease, [1] or mucosulfatidosis, [1] is a very rare autosomal recessive [2] lysosomal storage disease [3] caused by a deficiency in multiple sulfatase enzymes, or in formylglycine-generating enzyme, which activates sulfatases. [4]: 502 [5] It is similar to mucopolysaccharidosis. [6]
X-linked ichthyosis, a form of ichthyosis caused by a hereditary deficiency of the steroid sulfatase (STS) enzyme. It is fairly rare, affecting one in 2,000 to one in 6,000 males. [12] X-linked agammaglobulinemia (XLA), which affects the body's ability to fight infection. XLA patients do not generate mature B cells. [13]
Hunter syndrome is caused by a deficiency of the lysosomal enzyme iduronate-2-sulfatase (I2S). [2] [3] The lack of this enzyme causes heparan sulfate and dermatan sulfate to accumulate in all body tissues. [4] Hunter syndrome is the only MPS syndrome to exhibit X-linked recessive inheritance. [4] The symptoms of Hunter syndrome are comparable ...
MPS II, Hunter syndrome or iduronate sulfatase deficiency, is caused by lack of the enzyme iduronate sulfatase. Hunter syndrome has two clinical subtypes and (since it shows X-linked recessive inheritance) is the only one of the mucopolysaccharidoses in which the mother alone can pass the defective gene to a son.
Whether you have influenza A or B, you can expect to develop the same general set of symptoms, the experts say. In fact, experts sometimes use the term "flu-like illness" to refer to other ...
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