Proteus syndrome
עודכן לאחרונה 28 פבר׳ 2023
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Proteus syndrome is a rare condition characterised by overgrowth of the bones, skin, and other tissues. Organs and tissues affected by the disease grow out of proportion to the rest of the body. The overgrowth is usually asymmetric, which means it affects the right and left sides of the body differently. Newborns with Proteus syndrome have few or no signs of the condition. Overgrowth becomes apparent between the ages of 6 and 18 months and gets more severe with age.
תיאור
Proteus syndrome is a rare condition characterised by overgrowth of the bones, skin, and other tissues. Organs and tissues affected by the disease grow out of proportion to the rest of the body. The overgrowth is usually asymmetric, which means it affects the right and left sides of the body differently. Newborns with Proteus syndrome have few or no signs of the condition. Overgrowth becomes apparent between the ages of 6 and 18 months and gets more severe with age.
In people with Proteus syndrome, the pattern of overgrowth varies greatly but can affect almost any part of the body. Bones in the limbs, skull, and spine are often affected. The condition can also cause a variety of skin growths, particularly a thick, raised, and deeply grooved lesion known as a cerebriform connective tissue nevus. This type of skin growth usually occurs on the soles of the feet and is hardly ever seen in conditions other than Proteus syndrome. Blood vessels (vascular tissue) and fat (adipose tissue) can also grow abnormally in Proteus syndrome.
Some people with Proteus syndrome have neurological abnormalities, including intellectual disability, seizures, and vision loss. Affected individuals may also have distinctive facial features such as a long face, outside corners of the eyes that point downward (down-slanting palpebral fissures), a low nasal bridge with wide nostrils, and an open-mouth expression. For reasons that are unclear, affected people with neurological symptoms are more likely to have distinctive facial features than those without neurological symptoms. It is unclear how these signs and symptoms are related to abnormal growth.
Other potential complications of Proteus syndrome include an increased risk of developing various types of noncancerous (benign) tumours and a type of blood clot called a deep venous thrombosis (DVT). DVTs occur most often in the deep veins of the legs or arms. If these clots travel through the bloodstream, they can lodge in the lungs and cause a life-threatening complication called a pulmonary embolism. Pulmonary embolism is a common cause of death in people with Proteus syndrome.
Inheritance patterns
The source lists the following possible inheritance patterns: Pattern unknown. More than one pattern can apply in different cases.
Related genes
Other names
PS
Related patient information and medicines
Patient information leaflet
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תסמונת טכיקרדיה תנוחתית
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קריאה נוספת והפניות
- Proteus syndrome; MedlinePlus, National Library of Medicine.
- Biesecker L. The challenges of Proteus syndrome: diagnosis and management. Eur J Hum Genet. 2006 Nov;14(11):1151-7. doi: 10.1038/sj.ejhg.5201638. Epub 2006 Aug 2.
- Biesecker LG, Happle R, Mulliken JB, Weksberg R, Graham JM Jr, Viljoen DL, Cohen MM Jr. Proteus syndrome: diagnostic criteria, differential diagnosis, and patient evaluation. Am J Med Genet. 1999 Jun 11;84(5):389-95. doi: 10.1002/(sici)1096-8628(19990611)84:53.0.co;2-o.
- Cohen MM Jr, Turner JT, Biesecker LG. Proteus syndrome: misdiagnosis with PTEN mutations. Am J Med Genet A. 2003 Nov 1;122A(4):323-4. doi: 10.1002/ajmg.a.20474. No abstract available.
- Cohen MM Jr. Proteus syndrome: an update. Am J Med Genet C Semin Med Genet. 2005 Aug 15;137C(1):38-52. doi: 10.1002/ajmg.c.30063.
- Lindhurst MJ, Sapp JC, Teer JK, Johnston JJ, Finn EM, Peters K, Turner J, Cannons JL, Bick D, Blakemore L, Blumhorst C, Brockmann K, Calder P, Cherman N, Deardorff MA, Everman DB, Golas G, Greenstein RM, Kato BM, Keppler-Noreuil KM, Kuznetsov SA, Miyamoto RT, Newman K, Ng D, O'Brien K, Rothenberg S, Schwartzentruber DJ, Singhal V, Tirabosco R, Upton J, Wientroub S, Zackai EH, Hoag K, Whitewood-Neal T, Robey PG, Schwartzberg PL, Darling TN, Tosi LL, Mullikin JC, Biesecker LG. A mosaic activating mutation in AKT1 associated with the Proteus syndrome. N Engl J Med. 2011 Aug 18;365(7):611-9. doi: 10.1056/NEJMoa1104017. Epub 2011 Jul 27.
- Turner JT, Cohen MM Jr, Biesecker LG. Reassessment of the Proteus syndrome literature: application of diagnostic criteria to published cases. Am J Med Genet A. 2004 Oct 1;130A(2):111-22. doi: 10.1002/ajmg.a.30327.
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