Disease or Syndrome
mandibulofacial dysostosis
Subclass of:
Congenital ocular coloboma (disorder);
Craniofacial Dysostosis
Definitions related to mandibulofacial dysostosis:
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(treacher collins syndrome) A rare autosomal dominant syndrome caused by mutations in the TCOF1 gene. Its characteristics include underdevelopment of the facial bones, small jaw and chin, absent or small ears, defects in the middle ear resulting in hearing loss, and downward sloping palpebral fissures.NCI ThesaurusU.S. National Cancer Institute, 2021
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A hereditary disorder occurring in two forms: the complete form (Franceschetti's syndrome) is characterized by antimongoloid slant of the palpebral fissures, COLOBOMA of the lower lid, MICROGNATHIA and hypoplasia of the ZYGOMATIC ARCHES, and CONGENITAL MICROTIA. It is transmitted as an autosomal trait. The incomplete form (Treacher Collins syndrome) is characterized by the same anomalies in less pronounced degree. It occurs sporadically, but an autosomal dominant mode of transmission is suspected. (Dorland, 27th ed)NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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A type of craniofacial dysostosis associated with abnormalities of the external ears, mirognathia, macrostomia, coloboma of the lower eyelid, and cleft palate. This is a bundled term that is left in the HPO now for convenience with legacy annotations but should not be used for new annotations.Human Phenotype Ontology (HPO)The Human Phenotype Ontology Project, 2021
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Treacher Collins syndrome (TCS) is characterized by bilateral and symmetric downslanting palpebral fissures, malar hypoplasia, micrognathia, and external ear abnormalities. Hypoplasia of the zygomatic bones and mandible can cause significant feeding and respiratory difficulties. About 40%-50% of individuals have conductive hearing loss attributed most commonly to malformation of the ossicles and hypoplasia of the middle ear cavities. Inner ear structures tend to be normal. Other, less common abnormalities include cleft palate and unilateral or bilateral choanal stenosis or atresia. Typically intellect is normal.GeneReviewsUniversity of Washington, 2021
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Treacher Collins syndrome (TCS) is a condition that affects the development of bones and other tissues of the face. The signs and symptoms vary greatly, ranging from almost unnoticeable to severe. Most affected people have underdeveloped facial bones, particularly the cheek bones, and a very small jaw and chin (micrognathia). Other...National Center for Advancing Translational Sciences
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Mandibulofacial dysostosis, a rare, genetic disorder, inherited as an autosomal-dominant trait and characterized by some or all of the following: underdevelopment of the cheek and jaw bones, widely separated eyes, malformation of the lower eyelid and lack of eyelashes, malformation of the ear...Encyclopedia Britannica, Inc., 2020
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