Campomelic dysplasia
Dernière mise à jour 27 oct. 2023
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Campomelic dysplasia is a severe disorder that affects development of the skeleton, reproductive system, and other parts of the body. This condition is often life-threatening in the newborn period.
Description
Campomelic dysplasia is a severe disorder that affects development of the skeleton, reproductive system, and other parts of the body. This condition is often life-threatening in the newborn period.
The term "campomelic" comes from the Greek words for "bent limb." Affected individuals are typically born with bowing of the long bones in the legs, and occasionally, bowing in the arms. Bowing can cause characteristic skin dimples to form over the curved bone, especially on the lower legs. People with campomelic dysplasia usually have short legs, dislocated hips, underdeveloped shoulder blades, 11 pairs of ribs instead of 12, bone abnormalities in the neck, and inward- and upward-turning feet (clubfeet). These skeletal abnormalities begin developing before birth and can often be seen on ultrasound. When affected individuals have features of this disorder but do not have bowed limbs, they are said to have acampomelic campomelic dysplasia.
Approximately 75 percent of affected individuals with a typical male chromosome pattern (46,XY) have normal female genitalia or genitalia that do not look clearly male or clearly female. Internal reproductive organs may not correspond with the external genitalia; the internal organs can be male (testes), female (ovaries), or a combination of the two. For example, an individual with female external genitalia may have testes or a combination of testes and ovaries.
Affected individuals have distinctive facial features, including a small chin, prominent eyes, and a flat face. They also have a large head compared to their body size. A particular group of physical features, called Pierre Robin sequence, is common in people with campomelic dysplasia. Pierre Robin sequence includes an opening in the roof of the mouth (a cleft palate), a tongue that is placed further back than normal (glossoptosis), and a small lower jaw (micrognathia). People with campomelic dysplasia are often born with weakened cartilage that forms the upper respiratory tract. This abnormality, called laryngotracheomalacia, partially blocks the airway and causes difficulty breathing. Laryngotracheomalacia contributes to the poor survival of infants with campomelic dysplasia.
Only a few people with campomelic dysplasia survive past infancy. As these individuals age, they may develop an abnormal curvature of the spine (scoliosis) and other spine abnormalities that compress the spinal cord. People with campomelic dysplasia may also have short stature and hearing loss.
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
Campomelic dwarfism
Campomelic syndrome
Camptomelic dysplasia
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Checking your baby's skin for birthmarks and rashes, as well as colour and texture. Examination of your baby's hips. This is a test to exclude dysplasie développementale de la hanche , which is problem with the way that the hip joint develops. Examination of your baby's scrotum (in boys). All boys have their scrotum examined to determine if the.
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Lectures complémentaires et références
- Campomelic dysplasia; MedlinePlus, National Library of Medicine.
- Barone C, Bartoloni G, Baffico AM, Pappalardo E, Mura I, Ettore G, Bianca S. Novel c.358C>T mutation of SOX9 gene in prenatal diagnosis of campomelic dysplasia. Congenit Anom (Kyoto). 2014 Aug;54(3):193-4. doi: 10.1111/cga.12054. No abstract available.
- Beaulieu Bergeron M, Lemyre E, Rypens F, Scherer G, Lemieux N, Fournet JC. Diagnosis of true hermaphroditism in a fetus with acampomelic campomelic dysplasia. Prenat Diagn. 2009 May;29(5):528-30. doi: 10.1002/pd.2187. No abstract available.
- Bien-Willner GA, Stankiewicz P, Lupski JR. SOX9cre1, a cis-acting regulatory element located 1.1 Mb upstream of SOX9, mediates its enhancement through the SHH pathway. Hum Mol Genet. 2007 May 15;16(10):1143-56. doi: 10.1093/hmg/ddm061. Epub 2007 Apr 4.
- Hill-Harfe KL, Kaplan L, Stalker HJ, Zori RT, Pop R, Scherer G, Wallace MR. Fine mapping of chromosome 17 translocation breakpoints > or = 900 Kb upstream of SOX9 in acampomelic campomelic dysplasia and a mild, familial skeletal dysplasia. Am J Hum Genet. 2005 Apr;76(4):663-71. doi: 10.1086/429254.
- Kobayashi A, Chang H, Chaboissier MC, Schedl A, Behringer RR. Sox9 in testis determination. Ann N Y Acad Sci. 2005 Dec;1061:9-17. doi: 10.1196/annals.1336.003.
- Leipoldt M, Erdel M, Bien-Willner GA, Smyk M, Theurl M, Yatsenko SA, Lupski JR, Lane AH, Shanske AL, Stankiewicz P, Scherer G. Two novel translocation breakpoints upstream of SOX9 define borders of the proximal and distal breakpoint cluster region in campomelic dysplasia. Clin Genet. 2007 Jan;71(1):67-75. doi: 10.1111/j.1399-0004.2007.00736.x.
- Mansour S, Offiah AC, McDowall S, Sim P, Tolmie J, Hall C. The phenotype of survivors of campomelic dysplasia. J Med Genet. 2002 Aug;39(8):597-602. doi: 10.1136/jmg.39.8.597. No abstract available.
- Nelson ME, Griffin GR, Innis JW, Green GE. Campomelic dysplasia: airway management in two patients and an update on clinical-molecular correlations in the head and neck. Ann Otol Rhinol Laryngol. 2011 Oct;120(10):682-5. doi: 10.1177/000348941112001009.
- Pop R, Zaragoza MV, Gaudette M, Dohrmann U, Scherer G. A homozygous nonsense mutation in SOX9 in the dominant disorder campomelic dysplasia: a case of mitotic gene conversion. Hum Genet. 2005 Jun;117(1):43-53. doi: 10.1007/s00439-005-1295-y. Epub 2005 Apr 2.
- Smyk M, Obersztyn E, Nowakowska B, Bocian E, Cheung SW, Mazurczak T, Stankiewicz P. Recurrent SOX9 deletion campomelic dysplasia due to somatic mosaicism in the father. Am J Med Genet A. 2007 Apr 15;143A(8):866-70. doi: 10.1002/ajmg.a.31631.
- Unger S, Scherer G, Superti-Furga A. Campomelic Dysplasia. 2008 Jul 31 [updated 2023 Apr 6]. 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/NBK1760/
- Velagaleti GV, Bien-Willner GA, Northup JK, Lockhart LH, Hawkins JC, Jalal SM, Withers M, Lupski JR, Stankiewicz P. Position effects due to chromosome breakpoints that map approximately 900 Kb upstream and approximately 1.3 Mb downstream of SOX9 in two patients with campomelic dysplasia. Am J Hum Genet. 2005 Apr;76(4):652-62. doi: 10.1086/429252. Epub 2005 Feb 22.
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