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Cerebro-facio-thoracic dysplasia
URL of this page: https://medlineplus.gov/genetics/condition/cerebro-facio-thoracic-dysplasia/

Cerebro-facio-thoracic dysplasia

Description

Cerebro-facio-thoracic dysplasia is a rare condition characterized by abnormal development (dysplasia) of the brain (cerebro) and structures in the face (facio) and torso (thoracic). The problems with development lead to the key features of cerebro-facio-thoracic dysplasia, which include severe intellectual disability, distinctive facial features, and abnormalities of the ribs and spinal bones (vertebrae).

In addition to intellectual disability, individuals with cerebro-facio-thoracic dysplasia have delayed development of speech and movement (motor) skills, and in some, these skills never develop. Nearly one-quarter of affected individuals never learn to speak and almost half are unable to walk. Weak muscle tone (hypotonia) and difficulty feeding occur in some affected infants. People with cerebro-facio-thoracic dysplasia can have neurodevelopmental problems, such as anxiety, autism spectrum disorder, or self-injuring behavior; however, many people with the condition are described as friendly and good-natured.

Distinctive facial features common in cerebro-facio-thoracic dysplasia include a wide, short skull (brachycephaly); highly arched eyebrows or eyebrows that grow together in the middle (synophrys); widely spaced eyes (hypertelorism); a wide nasal bridge; low-set ears; an upper lip with pronounced curves (Cupid's bow upper lip); and small teeth (microdontia). Some affected individuals have overgrowth of the gums (gingival hyperplasia), an opening in the roof of the mouth (cleft palate), or a split in the upper lip (cleft lip).

Problems with bone development in the torso (thorax) commonly leads to bone abnormalities such as two or more ribs that are joined together (fused) or ribs that are abnormally shaped with two prongs at one end (bifid ribs). Many people with cerebro-facio-thoracic dysplasia have abnormal side-to-side curvature of the spine (scoliosis) due to malformation of the vertebrae; some vertebrae may also be fused. Additionally, the shoulder blades can be affected in people with this condition.

A wide variety of other features can occur in cerebro-facio-thoracic dysplasia, such as abnormalities involving the eyes, skin, or hair. Heart defects, digestive problems, or genitourinary problems (such as abnormal kidneys or reproductive organs) can also occur. Affected individuals may also have bone or joint abnormalities in other parts of the body.

Frequency

Cerebro-facio-thoracic dysplasia is a rare disorder. Its prevalence is unknown.

Causes

Cerebro-facio-thoracic dysplasia is caused by mutations in a gene called TMCO1. This gene provides instructions for making a protein that forms specialized structures called channels through which positively charged calcium atoms (calcium ions) flow. The protein is found in the membrane of a cell structure called the endoplasmic reticulum, which acts as a storage center for calcium ions. When there is too much calcium in the endoplasmic reticulum, four TMCO1 proteins come together to form a channel that releases the excess calcium into the surrounding fluid inside the cell (cytoplasm). Calcium acts as a signal for many cellular functions including control of cell growth and division and gene activity. The proper balance of calcium ions in cells and cell compartments is important for the development and function of various tissues and organs.

TMCO1 gene mutations result in a shortage of TMCO1 proteins. Without this protein, TMCO1 channels cannot form, and excess calcium builds up in the endoplasmic reticulum. The imbalance of calcium ions disrupts development of the brain and structures in the head, face, and torso, resulting in the features of cerebro-facio-thoracic dysplasia.

Learn more about the gene associated with Cerebro-facio-thoracic dysplasia

  • TMCO1

Inheritance

This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.

Other Names for This Condition

  • Cerebrofaciothoracic dysplasia
  • CFSMR
  • CFTD
  • Craniofacial dysmorphism, skeletal anomalies, and mental retardation syndrome
  • Pascual-Castroviejo syndrome
  • TMCO1 defect syndrome

Additional Information & Resources

Genetic Testing Information

  • Genetic Testing Registry: Cerebro-facio-thoracic dysplasia From the National Institutes of Health

Genetic and Rare Diseases Information Center

  • Cerebrofaciothoracic dysplasia From the National Institutes of Health

Patient Support and Advocacy Resources

  • National Organization for Rare Disorders (NORD)

Catalog of Genes and Diseases from OMIM

  • CRANIOFACIAL DYSMORPHISM, SKELETAL ANOMALIES, AND IMPAIRED INTELLECTUAL DEVELOPMENT SYNDROME 1; CFSMR1

Scientific Articles on PubMed

  • PubMed From the National Institutes of Health

References

  • Alanay Y, Erguner B, Utine E, Hacariz O, Kiper PO, Taskiran EZ, Percin F, Uz E, Sagiroglu MS, Yuksel B, Boduroglu K, Akarsu NA. TMCO1 deficiency causes autosomal recessive cerebrofaciothoracic dysplasia. Am J Med Genet A. 2014 Feb;164A(2):291-304. doi: 10.1002/ajmg.a.36248. Epub 2013 Nov 5. Citation on PubMed
  • Michael Yates T, Ng OH, Offiah AC, Willoughby J, Berg JN; DDD Study; Johnson DS. Cerebrofaciothoracic dysplasia: Four new patients with a recurrent TMCO1 pathogenic variant. Am J Med Genet A. 2019 Jan;179(1):43-49. doi: 10.1002/ajmg.a.60678. Epub 2018 Dec 17. Citation on PubMed
  • Pehlivan D, Karaca E, Aydin H, Beck CR, Gambin T, Muzny DM, Bilge Geckinli B, Karaman A, Jhangiani SN; Centers for Mendelian Genomics; Gibbs RA, Lupski JR. Whole-exome sequencing links TMCO1 defect syndrome with cerebro-facio-thoracic dysplasia. Eur J Hum Genet. 2014 Sep;22(9):1145-8. doi: 10.1038/ejhg.2013.291. Epub 2014 Jan 15. Citation on PubMed or Free article on PubMed Central
  • Tender JAF, Ferreira CR. Cerebro-facio-thoracic dysplasia (Pascual-Castroviejo syndrome): Identification of a novel mutation, use of facial recognition analysis, and review of the literature. Transl Sci Rare Dis. 2018 Apr 13;3(1):37-43. doi: 10.3233/TRD-180022. Citation on PubMed or Free article on PubMed Central
  • Wang QC, Zheng Q, Tan H, Zhang B, Li X, Yang Y, Yu J, Liu Y, Chai H, Wang X, Sun Z, Wang JQ, Zhu S, Wang F, Yang M, Guo C, Wang H, Zheng Q, Li Y, Chen Q, Zhou A, Tang TS. TMCO1 Is an ER Ca(2+) Load-Activated Ca(2+) Channel. Cell. 2016 Jun 2;165(6):1454-1466. doi: 10.1016/j.cell.2016.04.051. Epub 2016 May 19. Citation on PubMed or Free article on PubMed Central
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Related Health Topics

  • Craniofacial Abnormalities
  • Developmental Disabilities
  • Genetic Disorders

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