Branchio-oculo-facial syndrome
अंतिम अद्यतन 18 Aug 2020
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Branchio-oculo-facial syndrome is a condition that affects development before birth, particularly of structures in the face and neck. Its characteristic features include skin anomalies on the neck, malformations of the eyes and ears, and distinctive facial features.
विवरण
Branchio-oculo-facial syndrome is a condition that affects development before birth, particularly of structures in the face and neck. Its characteristic features include skin anomalies on the neck, malformations of the eyes and ears, and distinctive facial features.
"Branchio-" refers to the branchial arches, which are structures in the developing embryo that give rise to tissues in the face and neck. In people with branchio-oculo-facial syndrome, the first and second branchial arches do not develop properly, leading to abnormal patches of skin, typically on the neck or near the ears. These patches can be unusually thin, hairy, or red and densely packed with blood vessels (hemangiomatous). In a small number of individuals, tissue from a gland called the thymus is abnormally located on the skin of the neck (dermal thymus). Problems with branchial arch development underlie many of the other features of branchio-oculo-facial syndrome.
"Oculo-" refers to the eyes. Many people with branchio-oculo-facial syndrome have malformations of the eyes that can lead to vision impairment. These abnormalities include unusually small eyeballs (microphthalmia), no eyeballs (anophthalmia), a gap or split in structures that make up the eyes (coloboma), or blockage of the tear ducts (nasolacrimal duct stenosis).
Problems with development of the face lead to distinctive facial features in people with branchio-oculo-facial syndrome. Many affected individuals have a split in the upper lip (cleft lip) or a pointed upper lip that resembles a poorly repaired cleft lip (often called a pseudocleft lip) with or without an opening in the roof of the mouth (cleft palate). Other facial characteristics include widely spaced eyes (hypertelorism), an increased distance between the inner corners of the eyes (telecanthus), outside corners of the eyes that point upward (upslanting palpebral fissures), a broad nose with a flattened tip, and weakness of the muscles in the lower face. The ears are also commonly affected, resulting in malformed or prominent ears. Abnormalities of the inner ear or of the tiny bones in the ears (ossicles) can cause hearing loss in people with this condition.
Branchio-oculo-facial syndrome can affect other structures and tissues as well. Some affected individuals have kidney abnormalities, such as malformed kidneys or multiple kidney cysts. Nail and teeth abnormalities also occur, and some people with this condition have prematurely graying hair.
Inheritance patterns
The source lists the following possible inheritance patterns: Autosomal dominant. More than one pattern can apply in different cases.
Related genes
Other names
BOFS
Branchial clefts with characteristic facies, growth retardation, imperforate nasolacrimal duct, and premature aging
Hemangiomatous branchial clefts-lip pseudocleft syndrome
Lip pseudocleft-hemagiomatous branchial cyst syndrome
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अधिक पठन और संदर्भ
- Branchio-oculo-facial syndrome; MedlinePlus, National Library of Medicine.
- Developmental Biology (sixth edition, 2000): The Neural Crest
- Haldeman-Englert CR, Lin AE, Milunsky JM. Branchiooculofacial Syndrome. 2011 May 31 [updated 2025 Aug 14]. In: Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2026. Available from http://www.ncbi.nlm.nih.gov/books/NBK55063/
- Lin AE, Gorlin RJ, Lurie IW, Brunner HG, van der Burgt I, Naumchik IV, Rumyantseva NV, Stengel-Rutkowski S, Rosenbaum K, Meinecke P, et al. Further delineation of the branchio-oculo-facial syndrome. Am J Med Genet. 1995 Mar 13;56(1):42-59. doi: 10.1002/ajmg.1320560112.
- Milunsky JM, Maher TA, Zhao G, Roberts AE, Stalker HJ, Zori RT, Burch MN, Clemens M, Mulliken JB, Smith R, Lin AE. TFAP2A mutations result in branchio-oculo-facial syndrome. Am J Hum Genet. 2008 May;82(5):1171-7. doi: 10.1016/j.ajhg.2008.03.005.
- Milunsky JM, Maher TM, Zhao G, Wang Z, Mulliken JB, Chitayat D, Clemens M, Stalker HJ, Bauer M, Burch M, Chenier S, Cunningham ML, Drack AV, Janssens S, Karlea A, Klatt R, Kini U, Klein O, Lachmeijer AM, Megarbane A, Mendelsohn NJ, Meschino WS, Mortier GR, Parkash S, Ray CR, Roberts A, Roberts A, Reardon W, Schnur RE, Smith R, Splitt M, Tezcan K, Whiteford ML, Wong DA, Zori R, Lin AE. Genotype-phenotype analysis of the branchio-oculo-facial syndrome. Am J Med Genet A. 2011 Jan;155A(1):22-32. doi: 10.1002/ajmg.a.33783.
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