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Disease Profile

Bardet-Biedl syndrome 8

Prevalence
Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.

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US Estimated

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Europe Estimated

Age of onset

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ICD-10

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Inheritance

Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease.

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Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype.

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X-linked
dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.

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X-linked
recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder.

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Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.

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Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.

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Not applicable

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Symptoms

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Medical Terms Other Names
Learn More:
HPO ID
5%-29% of people have these symptoms
Aganglionic megacolon
Enlarged colon lacking nerve cells
0002251
Percent of people who have these symptoms is not available through HPO
Abnormality of the kidney
Abnormal kidney
0000077
Abnormality of the ovary
Abnormality of the ovaries
0000137
Allergy
0012393
Asthma
0002099
Astigmatism
Abnormal curving of the cornea or lens of the eye
0000483
Ataxia
0001251
Autosomal recessive inheritance
0000007
Biliary tract abnormality
0001080
Brachydactyly
Short fingers or toes
0001156
Broad foot
Broad feet
Wide foot

[ more ]

0001769
Cataract
Clouding of the lens of the eye
Cloudy lens

[ more ]

0000518
Decreased testicular size
Small testes
Small testis

[ more ]

0008734
Delayed speech and language development
Deficiency of speech development
Delayed language development
Delayed speech
Delayed speech acquisition
Delayed speech development
Impaired speech and language development
Impaired speech development
Language delay
Language delayed
Language development deficit
Late-onset speech development
Poor language development
Speech and language delay
Speech and language difficulties
Speech delay

[ more ]

0000750
Dental crowding
Crowded teeth
Dental overcrowding
Overcrowding of teeth

[ more ]

0000678
Diabetes mellitus
0000819
Foot polydactyly
Duplication of bones of the toes
0001829
Gait imbalance
Abnormality of balance
Abnormality of equilibrium
Imbalanced walk

[ more ]

0002141
Glaucoma
0000501
Global developmental delay
0001263
Hearing impairment
Deafness
Hearing defect

[ more ]

0000365
Hepatic fibrosis
0001395
High palate
Elevated palate
Increased palatal height

[ more ]

0000218
High, narrow palate
Narrow, high-arched roof of mouth
Narrow, highly arched roof of mouth

[ more ]

0002705
Hirsutism
Excessive hairiness
0001007
Hypertension
0000822
Hypodontia
Failure of development of between one and six teeth
0000668
Hypogonadism
Decreased activity of gonads
0000135
Intellectual disability
Mental deficiency
Mental retardation
Mental retardation, nonspecific
Mental-retardation

[ more ]

0001249
Left ventricular hypertrophy
0001712
Macrocephaly
Increased size of skull
Large head
Large head circumference

[ more ]

0000256
Micropenis
Short penis
Small penis

[ more ]

0000054
Myopia
Close sighted
Near sighted
Near sightedness
Nearsightedness

[ more ]

0000545
Nephrogenic diabetes insipidus
0009806
Neurological speech impairment
Speech disorder
Speech impairment
Speech impediment

[ more ]

0002167
Nystagmus
Involuntary, rapid, rhythmic eye movements
0000639
Obesity
Having too much body fat
0001513
Poor coordination
0002370
Postaxial hand polydactyly
Extra little finger
Extra pinkie finger
Extra pinky finger

[ more ]

0001162
Radial deviation of finger
0009466
Retinal degeneration
Retina degeneration
0000546
Retinal dystrophy
Breakdown of light-sensitive cells in back of eye
0000556
Rod-cone dystrophy
0000510
Short foot
Short feet
Small feet

[ more ]

0001773
Specific learning disability
0001328
Strabismus
Cross-eyed
Squint
Squint eyes

[ more ]

0000486
Syndactyly
Webbed fingers or toes
0001159
Vaginal atresia
Abnormally closed or absent vagina
0000148

Organizations

Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease

    Learn more

    These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

    In-Depth Information

    • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
    • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine.