Coffin Siris Syndrome
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Coffin Siris Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
- Fifth Digit Syndrome
- Mental Retardation with Hypoplastic 5th Fingernails and Toenails
- Short Stature-Onychodysplasia
Coffin-Siris syndrome is a rare genetic disorder that may be evident at birth (congenital). The disorder may be characterized by feeding difficulties and frequent respiratory infections during infancy, diminished muscle tone (hypotonia), abnormal looseness (laxity) of the joints, delayed bone age, and mental retardation. In addition, affected infants and children typically have short fifth fingers ("pinkies") and toes with underdeveloped (hypoplastic) or absent nails; other malformations of the fingers and toes; and characteristic abnormalities of the head and facial (craniofacial) area, resulting in a coarse facial appearance. Craniofacial malformations may include an abnormally small head (microcephaly); a wide nose with a low nasal bridge; a wide mouth with thick, prominent lips; thick eyebrows and eyelashes (hypertrichosis); and sparse scalp hair.
The underlying cause of Coffin-Siris syndrome is unknown. In most cases, the disorder is thought to result from new genetic changes (mutations) that appear to occur randomly for unknown reasons (sporadically). Familial cases have also been reported that suggest autosomal dominant or autosomal recessive inheritance.
National Foundation for Ectodermal Dysplasias
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NIH/National Institute of Child Health and Human Development
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Bethesda, MD 20892
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
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The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.
It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report
This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
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Last Updated: 3/27/2008
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