A rare frontonasal dysplasia characterized by distinct craniofacial (large fontanelle, hypertelorism, bifid nasal tip, nasal clefting, brachycephaly, median cleft face, carp-shaped mouth), brain (interhemispheric lipoma, agenesis of the corpus callosum), and limb (tibial hypoplasia/aplasia, club foot, symmetric preaxial polydactyly of the feet and bilateral clubbed and thickened nails of halluces) malformations as well as intellectual disability. Other manifestations sometimes reported include absent olfactory bulbs, hypopituitarism and cryptorchidism.
Summary
A rare frontonasal dysplasia characterized by distinct craniofacial (large fontanelle, hypertelorism, bifid nasal tip, nasal clefting, brachycephaly, median cleft face, carp-shaped mouth), brain (interhemispheric lipoma, agenesis of the corpus callosum), and limb (tibial hypoplasia/aplasia, club foot, symmetric preaxial polydactyly of the feet and bilateral clubbed and thickened nails of halluces) malformations as well as intellectual disability. Other manifestations sometimes reported include absent olfactory bulbs, hypopituitarism and cryptorchidism.A rare frontonasal dysplasia characterized by distinct craniofacial (large fontanelle, hypertelorism, bifid nasal tip, nasal clefting, brachycephaly, median cleft face, carp-shaped mouth), brain (interhemispheric lipoma, agenesis of the corpus callosum), and limb (tibial hypoplasia/aplasia, club foot, symmetric preaxial polydactyly of the feet and bilateral clubbed and thickened nails of halluces) malformations as well as intellectual disability. Other manifestations sometimes reported include absent olfactory bulbs, hypopituitarism and cryptorchidism.
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Resource(s) for Medical Professionals and Scientists on This Disease:
RARe-SOURCE™offers rare disease gene variant annotations and links to rare disease gene literature.
About Acromelic frontonasal dysostosis
Many rare diseases have limited information. Currently, GARD aims to provide the following information for this disease:
Population Estimate:Fewer than 1,000 people in the U.S. have thisdisease.
Symptoms:May start to appear during Pregnancy and as a Newborn.
Cause:This disease is caused by a change in the genetic material (DNA).
Organizations:GARD is not currently aware of organizations specific to this disease.
Acromelic frontonasal dysostosis is caused by genetic mutations, also known as pathogenic variants. Genetic mutations can be hereditary, when parents pass them down to their children, or they may occur randomly when cells are dividing. Genetic mutations may also result from contracted viruses, environmental factors, such as UV radiation from sunlight exposure, or a combination of any of these. Learn more about genetic diseases from the National Library of Medicine (NLM).
If you suspect you may have this disease, you may want to start collecting your family health history. Information such as other family members who have had similar symptoms, when their/your symptoms first appeared, or exposures to any potential disease-causing environmental factors should be discussed with your medical team. This tool from the Surgeon General can help you collect your family health history.
Can This Disease Be Passed Down From Parent to Child?
Yes. It is possible for a biological parent to pass down genetic mutations that cause or increase the chances of getting this disease to their child. This is known as inheritance. Knowing whether other family members have previously had this disease, also known as family health history, can be very important information for your medical team. This tool from the Surgeon General can help you collect your family health history.
There are multiple ways, or patterns, a disease can be inherited depending on the gene(s) involved. Based on GARD's current data, this disease can be inherited in the following pattern(s):
Autosomal Dominant
Autosomal means the gene involved is located on one of the numbered chromosomes. Dominant means that a child only needs to inherit one copy of the mutated gene, from either biological parent, to be affected by the disease.
People affected by an autosomal dominant disease have a 50% chance of passing on the mutated gene to their biological child.
When Do Symptoms of Acromelic frontonasal dysostosis Begin?
Symptoms of this disease may start to appear during Pregnancy and as a Newborn.
The age symptoms may begin to appear differs between diseases. Symptoms may begin in a single age range, or during several age ranges. The symptoms of some diseases may begin at any age. Knowing when symptoms may have appeared can help medical providers find the correct diagnosis.
Prenatal Selected
Before Birth
Newborn Selected
Birth-4 weeks
Infant
1-23 months
Child
2-11 years
Adolescent
12-18 years
Adult
19-65 years
Older Adult
65+ years
Symptoms may start to appear during Pregnancy and as a Newborn.
Symptoms
The types of symptoms experienced, and their intensity, may vary among people with this disease. Your experience may be different from others. Consult your health care team for more information.
The following describes the symptom(s) associated with this disease along with the corresponding body system(s), description, synonyms, and frequency (Note: Not all possible symptoms may be listed):
Skin System Skin System
37 Symptoms
37 Symptoms
37 Symptoms
Body Systems
Symptoms related to this disease may affect different systems of the body. Use the 'Filter and Sort' function to learn more about which body system(s) are affected by this disease and their associated symptom(s).
Medical Term
Description and Synonyms
Frequency
Abnormal toenail morphology
An anomaly of the toenail.
Synonyms:Abnormality of the toenail; Abnormality of the toenails
Frequency
Uncommon
Very frequent
Very frequent
Always
Abnormality of the glabella
An abnormality of the glabella.
Synonyms:Abnormality of the area between the eyebrows; Glabellar abnormality
Frequency
Uncommon
Very frequent
Very frequent
Always
Agenesis of corpus callosum
Absence of the corpus callosum as a result of the failure of the corpus callosum to develop, which can be the result of a failure in any one of the multiple steps of callosal development including cellular proliferation and migration, axonal growth or glial patterning at the midline.
Synonyms:Absence of corpus callosum; Absent corpus callosum; Agenesis of the corpus callosum; Callosal agenesis; Corpus callosum agenesis; Dysplastic or absent corpus callosum
A splitting of the nasal tip. Visually assessable vertical indentation, cleft, or depression of the nasal tip.
Synonyms:Bifid tip of nose; Cleft nasal tip
Frequency
Uncommon
Very frequent
Very frequent
Always
Bifid nose
Visually assessable vertical indentation, cleft, or depression of the nasal bridge, ridge and tip.
Synonyms:Bifid nasal bridge; Indentation or clefting of the nose
Frequency
Uncommon
Very frequent
Very frequent
Always
Brachycephaly
An abnormality of skull shape characterized by a decreased anterior-posterior diameter. That is, a cephalic index greater than 81%. Alternatively, an apparently shortened anteroposterior dimension (length) of the head compared to width.
Synonyms:Short and broad skull
Frequency
Uncommon
Very frequent
Very frequent
Always
Broad nasal tip
Increase in width of the nasal tip.
Synonyms:Broad nasal tip; Broad tip of nose; Broad, upturned nose; Increased breadth of nasal tip; Increased breadth of tip of nose; Increased width of nasal tip; Increased width of tip of nose; Nasal tip, broad; Nasal tip, wide; Wide tip of nose
Frequency
Uncommon
Very frequent
Very frequent
Always
Choroid plexus cyst
A cyst occurring within the choroid plexus within a cerebral ventricle.
Frequency
Uncommon
Frequent
Frequent
Always
Cryptorchidism
Testis in inguinal canal. That is, absence of one or both testes from the scrotum owing to failure of the testis or testes to descend through the inguinal canal to the scrotum.
A congenital subcutaneous cyst that arises from entrapment of skin along the lines of embryonic fusion. In contrast to epidermal cysts, dermoid cysts tend to contain various adnexal structures such as hair, sebaceous, eccrine or apocrine glands. Dermoid cysts are present at birth, and are indolent, firm, deep, subcutaneous nodules. They are often located on the head and neck, and rarely in the anogenital area. Dermoid cysts are\nslowly progressive and can grow to a size of 1 to 4 cm.
Frequency
Uncommon
Uncommon
Uncommon
Always
Encephalocele
A neural tube defect characterized by sac-like protrusions of the brain and the membranes that cover it through openings in the skull.
Synonyms:Bifid skull; Cranium bifidum
Frequency
Uncommon
Very frequent
Very frequent
Always
Glaucoma
Glaucoma refers loss of retinal ganglion cells in a characteristic pattern of optic neuropathy usually associated with increased intraocular pressure.
Frequency
Uncommon
Uncommon
Uncommon
Always
Global developmental delay
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
Synonyms:Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; Lack of psychomotor development; Motor and developmental delay; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development
Frequency
Uncommon
Very frequent
Very frequent
Always
Hypertelorism
Interpupillary distance more than 2 SD above the mean (alternatively, the appearance of an increased interpupillary distance or widely spaced eyes).
Synonyms:Excessive orbital separation; Increased distance between eye sockets; Increased distance between eyes; Increased interpupillary distance; Ocular hypertelorism; Wide-set eyes; Widely spaced eyes; Widened interpupillary distance
Frequency
Uncommon
Very frequent
Very frequent
Always
Hypopituitarism
This section is currently in development.
Frequency
Uncommon
Occasional
Occasional
Always
Hypoplasia of the olfactory bulb
Underdevelopment of the olfactory bulb.
Synonyms:Hypoplasia of olfactory bulb; Hypoplastic olfactory bulb
Frequency
Uncommon
Frequent
Frequent
Always
Intellectual disability
Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70.
In newborns, the two frontal bones, two parietal bones, and one occipital bone are joined by fibrous sutures, which form a small posterior fontanelle, and a larger, diamond-shaped anterior fontanelle. These regions allow for the skull to pass the birth canal and for later growth. The fontanelles gradually ossify, whereby the posterior fontanelle usually closes by eight weeks and the anterior fontanelle by the 9th to 16th month of age. Large fontanelles are diagnosed if the fontanelles are larger than age-dependent norms.
Synonyms:Enlarged fontanelles; Large fontanel; Large fontanelle; Large fontanels; Persistent wide fontanel; Wide fontanelles
Protrusion of the meninges through a defect of the skull or vertebral column.
Frequency
Uncommon
Very frequent
Very frequent
Always
Midline central nervous system lipomas
Synonyms:Midline CNS lipomas
Frequency
Uncommon
Very frequent
Very frequent
Always
Myopia
An abnormality of refraction characterized by the ability to see objects nearby clearly, while objects in the distance appear blurry.
Synonyms:Close sighted; Near sighted; Near sightedness; Nearsightedness
Frequency
Uncommon
Occasional
Occasional
Always
Patellar hypoplasia
Underdevelopment of the patella.
Synonyms:Hypoplastic patellae; Small kneecap; Small patella; Small patellae; Underdeveloped kneecap
Frequency
Uncommon
Occasional
Occasional
Always
Preaxial foot polydactyly
Duplication of all or part of the first ray.
Synonyms:Partial/complete duplication of the phalanges of the big toe; Polydactyly affecting the hallux; Preaxial hallucal polydactyly; Preaxial polydactyly of feet; Preaxial polydactyly of foot; Preaxial polydactyly of the feet; Preaxial polydactyly, feet
Frequency
Uncommon
Very frequent
Very frequent
Always
Ptosis
The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).
A seizure is an intermittent abnormality of nervous system physiology characterised by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.
Synonyms:Epileptic seizure; Seizures
Frequency
Uncommon
Occasional
Occasional
Always
Talipes equinovarus
Talipes equinovarus (also called clubfoot) typically has four main components: inversion and adduction of the forefoot; inversion of the heel and hindfoot; equinus (limitation of extension) of the ankle and subtalar joint; and internal rotation of the leg.
Synonyms:Club feet; Club foot; Clubbing of feet; Clubfeet; Clubfoot; Equinovarus; Foot, talipes equinovarus; Pes equinovarus; Pes equinus; Talipes varus
Frequency
Uncommon
Very frequent
Very frequent
Always
Telecanthus
Distance between the inner canthi more than two standard deviations above the mean (objective); or, apparently increased distance between the inner canthi.
Synonyms:Corners of eye widely separated; Dystopia canthorum; Increased distance between medial canthi; Increased intercanthal distance
Frequency
Uncommon
Very frequent
Very frequent
Always
Thick nasal alae
Increase in bulk of the ala nasi.
Synonyms:Ala nasi, thick; Thickening of the alae nasi
Frequency
Uncommon
Very frequent
Very frequent
Always
Upper airway obstruction
Increased resistance to the passage of air in the upper airway.
Synonyms:Upper airway obstruction
Frequency
Uncommon
Occasional
Occasional
Always
Ventriculomegaly
An increase in size of the ventricular system of the brain.
Distance between the oral commissures more than 2 SD above the mean. Alternatively, an apparently increased width of the oral aperture (subjective).
Synonyms:Broad mouth; Large mouth; Large oral aperture; Macrostomia; Wide mouth
Frequency
Uncommon
Occasional
Occasional
Always
Diagnostic Journey
On average, it takes more than six years to receive an accurate rare disease diagnosis. Many primary care providers (PCPs) may not be familiar with rare diseases, and you may need to see multiple specialists to reach the correct diagnosis. However, advocating for yourself with your healthcare team may help speed your time to diagnosis. To combat common challenges, be prepared:
Find disease-specific information to discuss with your healthcare providers.
Ask for diagnostic tests.
Request referrals to specialists.
Knowing where to start your diagnostic journey and how to navigate the next steps are critical to speeding your time to diagnosis
Your Diagnostic Team
How can a diagnostic team help?
Establishing care with a dedicated primary care provider (PCP) is an important early step in your rare disease journey. A PCP can help improve care and shorten the time to diagnosis by providing referrals to the appropriate specialists. These specialists, with advanced training in different body systems or types of diseases, can offer the specialized diagnostic procedures you need.
Diagnostic teams for Acromelic frontonasal dysostosis may include:
Multidisciplinary Care Centers
Is it time to find a multidisciplinary care center?
If you've visited your PCP, met with specialists, and undergone the recommended tests, but still do not have a confirmed diagnosis, it may be time to visit a multidisciplinary care center. Multidisciplinary care centers are usually teaching, university, or research hospitals that have teams of medical experts and specialists working together in the same location. This means a wide range of diagnostic tests and clinical knowledge are available at one facility, which can help increase communication and collaboration among your care team. The additional resources often available at multidisciplinary centers may help speed the time to diagnosis for rare diseases.
Is it time to find a multidisciplinary care center?
If you've visited your PCP, met with specialists, and undergone the recommended tests, but still do not have a confirmed diagnosis, it may be time to visit a multidisciplinary care center. Multidisciplinary care centers are usually teaching, university, or research hospitals that have teams of medical experts and specialists working together in the same location. This means a wide range of diagnostic tests and clinical knowledge are available at one facility, which can help increase communication and collaboration among your care team. The additional resources often available at multidisciplinary centers may help speed the time to diagnosis for rare diseases.
If a diagnosis remains unknown despite extensive efforts by your PCP and specialists, it can be challenging to know what kind of expert you may need or where to find one. A rare disease expert is a care provider that has knowledge or training on specific disease(s), but there may only be a few experts in your state, region, or country. Rare disease experts may work at large research or teaching hospitals. In complex cases, coordinating with a network of experts can help your care provider find the right diagnosis. Contact a GARD Information Specialist for help finding an expert.
You can ask your care providers for help finding an expert or use directory tools to search for experts near you. The National Organization for Rare Disorders (NORD) maintains a list of rare disease centers with experts that work together to find treatments and cures for a broad range of rare diseases. Search NORD's Center Directory to find experts near you.
Rare Disease Experts
How can you find a rare disease expert?
If a diagnosis remains unknown despite extensive efforts by your PCP and specialists, it can be challenging to know what kind of expert you may need or where to find one. A rare disease expert is a care provider that has knowledge or training on specific disease(s), but there may only be a few experts in your state, region, or country. Rare disease experts may work at large research or teaching hospitals. In complex cases, coordinating with a network of experts can help your care provider find the right diagnosis. Contact a GARD Information Specialist for help finding an expert.
You can ask your care providers for help finding an expert or use directory tools to search for experts near you. The National Organization for Rare Disorders (NORD) maintains a list of rare disease centers with experts that work together to find treatments and cures for a broad range of rare diseases. Search NORD's Center Directory to find experts near you.
Find Your Community
How Can Patient Organizations Help?
Patient organizations can help patients and families connect. They build public awareness of the disease and are a driving force behind research to improve patients' lives. They may offer online and in-person resources to help people live well with their disease. Many collaborate with medical experts and researchers.
Services of patient organizations differ, but may include:
Ways to connect to others and share personal stories
Easy-to-read information
Up-to-date treatment and research information
Patient registries
Lists of specialists or specialty centers
Financial aid and travel resources
Please note: GARD provides organizations for informational purposes only and not as an endorsement of their services. Please contact an organization directly if you have questions about the information or resources it provides.
Clinical studies are part of clinical research and play an important role in medical advances, including for rare diseases. Through clinical studies, researchers may ultimately uncover better ways to treat, prevent, diagnose, and understand human diseases.
What Are Clinical Studies?
Clinical studies are medical research involving people as participants. There are two main types of clinical studies:
Clinical trials determine if a new test or treatment for a disease is effective and safe by comparing groups receiving different tests/treatments.
Observational studies involve recording changes over time among a specific group of people in their natural settings.
People participate in clinical trials for many reasons. People with a disease may participate to receive the newest possible treatment and additional care from clinical study staff as well as to help others living with the same or similar disease. Healthy volunteers may participate to help others and to contribute to moving science forward.
To find the right clinical study we recommend you consult your doctors, other trusted medical professionals, and patient organizations. Additionally, you can use ClinicalTrials.gov to search for clinical studies by disease, terms, or location.
What if There Are No Available Clinical Studies?
ResearchMatch helps connect people interested in research studies with researchers from top medical centers across the United States. Anyone from the U.S. can register with this free program funded by NIH. Researchers from participating institutions use the database to search for and invite patients or healthy volunteers who meet their study criteria to participate.
Join the All of Us Research Program!
The All of Us Research Program is inviting 1 million people from all backgrounds across the U.S. to help build one of the most diverse health databases in history. Researchers will use the data to learn how our biology, lifestyle, and environment affect health. This may one day help them find ways to treat and prevent diseases.
What Are Clinical Studies?
Clinical studies are medical research involving people as participants. There are two main types of clinical studies:
Clinical trials determine if a new test or treatment for a disease is effective and safe by comparing groups receiving different tests/treatments.
Observational studies involve recording changes over time among a specific group of people in their natural settings.
People participate in clinical trials for many reasons. People with a disease may participate to receive the newest possible treatment and additional care from clinical study staff as well as to help others living with the same or similar disease. Healthy volunteers may participate to help others and to contribute to moving science forward.
To find the right clinical study we recommend you consult your doctors, other trusted medical professionals, and patient organizations. Additionally, you can use ClinicalTrials.gov to search for clinical studies by disease, terms, or location.People participate in clinical trials for many reasons. People with a disease may participate to receive the newest possible treatment and additional care from clinical study staff as well as to help others living with the same or similar disease. Healthy volunteers may participate to help others and to contribute to moving science forward.
To find the right clinical study we recommend you consult your doctors, other trusted medical professionals, and patient organizations. Additionally, you can use ClinicalTrials.gov to search for clinical studies by disease, terms, or location.
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What if There Are No Available Clinical Studies?
ResearchMatch helps connect people interested in research studies with researchers from top medical centers across the United States. Anyone from the U.S. can register with this free program funded by NIH. Researchers from participating institutions use the database to search for and invite patients or healthy volunteers who meet their study criteria to participate.
Join the All of Us Research Program!
The All of Us Research Program is inviting 1 million people from all backgrounds across the U.S. to help build one of the most diverse health databases in history. Researchers will use the data to learn how our biology, lifestyle, and environment affect health. This may one day help them find ways to treat and prevent diseases.
ClinicalTrials.gov, an affiliate of NIH, provides current information on clinical research studies in the United States and abroad. Talk to a trusted doctor before choosing to participate in any clinical study. We recommend checking this site often and searching for studies with related terms/synonyms to improve results.
Contact a GARD Information Specialist if you need help finding more information on this rare disease or available clinical studies. Please note that GARD cannot enroll individuals in clinical studies.
Use the contact form to send your questions to a GARD Information Specialist.
Please allow 2 to 10 business days for us to respond.
ClinicalTrials.gov, an affiliate of NIH, provides current information on clinical research studies in the United States and abroad. Talk to a trusted doctor before choosing to participate in any clinical study. We recommend checking this site often and searching for studies with related terms/synonyms to improve results.
Contact a GARD Information Specialist if you need help finding more information on this rare disease or available clinical studies. Please note that GARD cannot enroll individuals in clinical studies.
Use the contact form to send your questions to a GARD Information Specialist.
Please allow 2 to 10 business days for us to respond.
GARD collects data from a variety of sources to populate its website and provide accurate and reliable information on rare diseases.
GARD uses data collected from Orphanet and Online Mendelian Inheritance in Man (OMIM) to interpret and provide information on rare diseases. This includes names, synonyms, genes, symptom frequency, population estimates and more.
Orphanet is an online database of rare diseases and orphan drugs that provides aggregated data coordinated by INSERM-US14 in Paris.