| 词条 | Ichthyosis bullosa of Siemens |
| 释义 |
| synonyms = Bullous type of ichthyosis | name = Ichthyosis Bullosa of Siemens | image = Ichthyosis bullosa siemens.jpg | caption = Lower leg of a 12 month infant with ichthyosis bullosa of Siemens | meshName = | meshNumber = | symptoms = | complications = | onset = | duration = | types = | causes = | risks = | diagnosis = | differential = | prevention = | treatment = | medication = | prognosis = | frequency = | deaths = }}Ichthyosis bullosa of Siemens is a type of familial, autosomal dominant ichthyosis, a rare skin disorder.[1]{{rp|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] SymptomsIchthyosis bullosa of Siemens has symptoms very similar to epidermolytic hyperkeratosis but is generally milder. Ichthyosis bullosa of Siemens affects only the upper layers of the epidermis whilst epidermolytic hyperkeratosis affects the suprabasal layer which is deeper in the skin.[3] At birth the baby's skin has a red appearance like a sun burn (erythema). Blistering is usually present at birth and may be extensive or localized depending on the severity of the disease.[4] Over the first few weeks the redness disappears and is replaced by dry, flaking skin on the arms, legs and around the belly button.[4] Other areas of skin appear normal. The skin is fragile and is prone to blistering (caused by mild trauma or sweating).[4] After a few months hyperkeratosis develops with a dark grey or brown, ridged appearance on the ankles, knees and elbows.[4] Palms and soles are generally unaffected.[3] A slightly unpleasant, sweet odour may be present.[2] A distinctive characteristic of ichthyosis bullosa of Siemens that is not present in other forms of ichthyosis is called the "Mauserung phenomenon" (Mauserung is German for "moulting" and was first described by H.W.Siemens). These are small patches of bare, apparently normal skin in the middle of areas of hyperkeratosis.[3][5] As the sufferer ages the flaking and blistering should improve. The hyperkeratosis may grow more severe but more localized and is generally only present on flexural folds of the major joints.[4] GeneticsIchthyosis bullosa of Siemens is an autosomal dominant genetic condition caused by a mutation in the gene for keratin 2e on chromosome 12.[4][6][7][8]{{rp|563}} This means an affected person has a 50% chance of passing the condition on to their child. However, about half of cases, there is no parent with the condition and have the genetic fault due to a spontaneous mutation. [9]DiagnosisMild forms of ichthyosis bullosa of Siemens should be diagnosable from appearance and patient history alone. Severe cases are hard to distinguish from mild epidermolytic hyperkeratosis. A skin biopsy shows a characteristic damaged layer in the upper spinous level of the skin. It may be difficult to distinguish from epidermolytic hyperkeratosis. The gene causing ichthyosis bullosa of Siemens is known and so a diagnosis can be confirmed by genetic testing.[4] TreatmentsTreatments for ichthyosis bullosa of Siemens generally attempt to improve the appearance of the skin and the comfort of the sufferer. This is done by exfoliating and increasing the moisture of the skin. Common treatments include:
HistoryIchthyosis bullosa of Siemens was first described by the German dermatologist Hermann Werner Siemens in 1937 from his study of an affected family. [11]In 1994 the gene causing ichthyosis bullosa of Siemens was discovered. In the same year, it was also proved in the same year that ichthyosis exfoliativa is the same disease as ichthyosis bullosa of Siemens.[12] See also
References1. ^Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. {{ISBN|0-07-138076-0}}. 2. ^1 Caputo, Ruggero and Tadini, Gianluca: [https://books.google.com/books?id=tYfEVty3cegC Atlas of Genodermatoses], Page 19, Published by Taylor & Francis, 2005, {{ISBN|1-84184-251-6}} 3. ^1 2 Harper, John; Oranje, Arnold P. and Prose, Neil S.: [https://books.google.com/books?id=z0PEdterBCwC Textbook of Pediatric Dermatology], Page 1110, Published by Blackwell Science, 2000, {{ISBN|0-86542-939-1}} 4. ^1 Barnhill, Raymond L. and Crowson, A. Neil: [https://books.google.com/books?id=DWiE7fP6RmQC Textbook of Dermatopathology], Page 349, Published by McGraw-Hill Professional, 2004, {{ISBN|0-07-139660-8}} 5. ^Kirkham, Nigel and Lemoine, Nicholas R.: [https://books.google.com/books?id=Lgx6sUZ7PmEC Progress in Pathology], Page 107, Published by Cambridge University Press, 2001, {{ISBN|1-84110-050-1}} 6. ^{{cite journal|vauthors=Rothnagel JA, Traupe H, Wojcik S, Huber M, Hohl D, Pittelkow MR, Saeki H, Ishibashi Y, Roop DR | title = Mutations in the rod domain of keratin 2e in patients with ichthyosis bullosa of Siemens| journal = Nature Genetics| volume = 7| issue = 4| pages = 485–90|date=August 1994| pmid = 7524919| doi = 10.1038/ng0894-485 }} 7. ^{{OMIM|600194|Keratin 2}} 8. ^James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. {{ISBN|0-7216-2921-0}}. 9. ^Elias, Peter M and Feingold, Kenneth R. [https://books.google.com/books?id=gUpUacsvP5kC Skin Barrier], Page 490, Published by CRC Press, 2005, {{ISBN|0-8247-5815-3}} 10. ^Vahlquist, Anders and Duvic, Madeleine: [https://books.google.com/books?id=mbEBAEAaOKgC Retinoids and Carotenoids in Dermatology], Page 160, Published by CRC Press, 2007, {{ISBN|0-8493-3992-8}} 11. ^{{cite journal|last1=Siemens|first=H.W.|title=Dichtung und Wahrheit ueber die Ichthyosis bullosa, mit Bemerkungen zur Systematik der Epidermolysen|journal=Archives of Dermatology and Syphilology|volume=175|pages=590-608|date=1937}} 12. ^1 2 3 4 5 OMIM (Online Mendelian Inheritance in Man), Johns Hopkins University, [https://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=146800 Ichthyosis Bullosa of Siemens] External links{{Medical resources| DiseasesDB = | ICD10 = {{ICD10|Q|80|3|q|80}} | ICD9 = | ICDO = | OMIM = 146800 | MedlinePlus = | eMedicineSubj = | eMedicineTopic = | MeshID = D053560 | Orphanet = 455 }}{{Cytoskeletal defects}} 3 : Genodermatoses|Rare syndromes|Cytoskeletal defects |
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