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OPD2
MCID: OTP007
MIFTS: 46
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Otopalatodigital Syndrome, Type Ii (OPD2)
Categories:
Bone diseases, Ear diseases, Fetal diseases, Genetic diseases, Neuronal diseases, Oral diseases, Rare diseases
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MalaCards integrated aliases for Otopalatodigital Syndrome, Type Ii:
Characteristics:Orphanet epidemiological data:59
otopalatodigital syndrome type 2
Inheritance: X-linked dominant; Prevalence: <1/1000000 (Worldwide); Age of onset: Neonatal; Age of death: infantile; OMIM:57
Inheritance:
x-linked dominant
Miscellaneous:
otopalatodigital syndrome type i (opd1, ) is an allelic disorder frontometaphyseal dysplasia (fmd, ) is an allelic disorder melnick-needles syndrome (mns, ) is an allelic disorder majority of patients are stillborn or die before 5 months of age milder manifestations in heterozygous females (broad face, downslanting palpebral fissures, and cleft palate) periventricular heterotopia () is an allelic disorder HPO:32
otopalatodigital syndrome, type ii:
Clinical modifier stillbirth Inheritance x-linked dominant inheritance Classifications:
MalaCards categories:
Global: Genetic diseases Rare diseases Fetal diseases Anatomical: Neuronal diseases Ear diseases Bone diseases Oral diseases
ICD10:
34
Orphanet: 59
Rare neurological diseases
Rare otorhinolaryngological diseases
Rare bone diseases
Developmental anomalies during embryogenesis
Rare odontological diseases
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NIH Rare Diseases
:
53
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.Orpha Number: 90652DefinitionA severe form of otopalatodigital syndrome spectrum disorder, and is characterized by dysmorphic facies, severe skeletal dysplasia affecting the axial and appendicular skeleton, extraskeletal anomalies (including malformations of the brain, heart, genitourinary system, and intestine) and poor survival.EpidemiologyTo date, more than 40 cases of Otopalatodigital syndrome type 2 (OPD2) have been described in the literature.Clinical descriptionOPD2 is a congenital disorder. Intrauterine growth is usually normal and affected infants have large anterior fontanels, and facial dysmorphism including broad forehead and lateral fullness of the supraorbital ridge, hypertelorism, downslanting palpebral fissures, stubby nose with a flat root, midfacial hypoplasia, microstomia (with typical down turned bow of the upper lip), micrognathia, Pierre Robin sequence, posterior cleft palate (submucosal cleft palate or cleft velum), glossoptosis, malformed and/or apparently low-set ears. Additional features include skeletal anomalies: pectus deformity, short limbs, campomelia, fibular agenesis, flexion contractures of elbows, knees, rocker bottom or equinovarus feet, syndactyly (usually involving fingers III and IV in the hands and toes II to V in the feet), camptodactyly of fingers, and absent halluces. Extraskeletal malformations include malformations of the central nervous system (myelomeningocele /encephalocele, cerebellar hypoplasia, hydrocephalus), heart (congenital valvular heart defects), intestine, genitourinary system (hydronephrosis ? urethral valve/reflux, hypospadias, epispadias). Congenital corneal opacities, bilobed tongue, deafness, and Dandy-Walker malformation have been reported in a minority of OPD2 cases. Congenital glaucoma and cataracts have been described in one patient. Psychomotor development varies from normal to mild intellectual disability. Carrier females with OPD2 can be asymptomatic or exhibit a phenotype that can extend from a mild subclinical osteodysplasia to a presentation indistinguishable from that of affected males. Prognosis of OPD2 is poor and perinatal death is common, secondary to cardio respiratory failure.EtiologyOPD2 is caused by gain of function mutations in the gene FLNA (Xq28) that encodes filamin A. However the pathogenesis is still elusive. OPD2 is allelic with 4 other skeletal dysplasias (OPD1, Melnick-Needles syndrome (MNS), terminal osseous dysplasia - pigmentary defects (TOD) and frontometaphyseal dysplasia (FMD)).Genetic counselingOPD2 is inherited in an X-linked dominant manner. Male-to-male transmission has not been reported. The chance of transmitting the mutation in each pregnancy is 50%; males inheriting the mutation will be affected while females who inherit the mutation are less severely affected.Visit the Orphanet disease page for more resources.
MalaCards based summary : Otopalatodigital Syndrome, Type Ii, also known as oto-palato-digital syndrome, type ii, is related to rubinstein-taybi syndrome 1 and rubinstein-taybi syndrome 2. An important gene associated with Otopalatodigital Syndrome, Type Ii is FLNA (Filamin A). The drugs Valproic acid and Neurotransmitter Agents have been mentioned in the context of this disorder. Affiliated tissues include bone, heart and brain, and related phenotypes are malar flattening and hypertelorism Genetics Home Reference : 25 Otopalatodigital syndrome type 2 is a disorder involving abnormalities in skeletal development and other health problems. It is a member of a group of related conditions called otopalatodigital spectrum disorders, which also includes otopalatodigital syndrome type 1, frontometaphyseal dysplasia, and Melnick-Needles syndrome. In general, these disorders involve hearing loss caused by malformations in the tiny bones in the ears (ossicles), problems in the development of the roof of the mouth (palate), and skeletal abnormalities involving the fingers and/or toes (digits). Otopalatodigital syndrome type 2 also tends to cause problems in other areas of the body, such as the brain and heart. People with otopalatodigital syndrome type 2 have characteristic facial features including wide-set and downward-slanting eyes; prominent brow ridges; a broad, flat nose; and a very small lower jaw and chin (micrognathia). The base of the skull may be thickened. Some people with this disorder have hearing loss. Affected individuals are usually of short stature and may have abnormalities of the fingers and toes, such as unusual curvature of the fingers (camptodactyly) and shortened or absent thumbs and big toes. They may have bowed limbs; underdeveloped, irregular ribs that may cause problems with breathing; and other abnormal or absent bones. Some may be born with an opening in the roof of the mouth (a cleft palate). In addition to skeletal abnormalities, individuals with otopalatodigital syndrome type 2 may have developmental delay, increased fluid in the center of the brain (hydrocephalus), protrusion of the abdominal organs through the navel (omphalocele), heart defects, chest abnormalities, obstruction of the ducts between the kidneys and bladder (ureters), and, in males, opening of the urethra on the underside of the penis (hypospadias). Males with otopalatodigital syndrome type 2 generally have much more severe signs and symptoms than do females. Males with the disorder usually do not live beyond their first year, because their underdeveloped rib cage does not allow sufficient lung expansion for breathing. OMIM : 57 Otopalatodigital syndrome-2 is 1 of 4 otopalatodigital syndromes caused by mutations in the FLNA gene. The disorders, which include frontometaphyseal dysplasia (FMD1; 305620), otopalatodigital syndrome-1 (OPD1; 311300), and Melnick-Needles syndrome (MNS; 309350), constitute a phenotypic spectrum. At the mild end of the spectrum, males with OPD1 have cleft palate and mild skeletal anomalies with conductive deafness caused by ossicular anomalies. FMD is characterized by a generalized skeletal dysplasia, deafness and urogenital defects. Males with OPD2 have disabling skeletal anomalies in addition to variable malformations in the hindbrain, heart, intestines, and kidneys that frequently lead to perinatal death. The most severe phenotype, MNS, is characterized by a skeletal dysplasia in the heterozygote. Affected males exhibit severe malformations similar to those observed in individuals with OPD2, resulting in prenatal lethality or death in the first few months of life (review by Robertson, 2005). Verloes et al. (2000) suggested that these disorders constitute a single entity, which they termed 'frontootopalatodigital osteodysplasia.' (304120) UniProtKB/Swiss-Prot : 74 Otopalatodigital syndrome 2: Congenital bone disorder that is characterized by abnormally modeled, bowed bones, small or absent first digits and, more variably, cleft palate, posterior fossa brain anomalies, omphalocele and cardiac defects. |
Human phenotypes related to Otopalatodigital Syndrome, Type Ii:59 32 (show top 50) (show all 97)
Symptoms via clinical synopsis from OMIM:57Clinical features from OMIM:304120 |
Drugs for Otopalatodigital Syndrome, Type Ii (from DrugBank, HMDB, Dgidb, PharmGKB, IUPHAR, NovoSeek, BitterDB):(show all 9)
Interventional clinical trials:
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MalaCards organs/tissues related to Otopalatodigital Syndrome, Type Ii:41
Bone,
Heart,
Brain,
Kidney,
Lung,
Tongue,
Eye
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Articles related to Otopalatodigital Syndrome, Type Ii:(show all 37)
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Genes related to Otopalatodigital Syndrome, Type Ii (1 elite genes): - Elite gene
- Cancer Census gene in COSMIC
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ClinVar genetic disease variations for Otopalatodigital Syndrome, Type Ii:6 (show top 50) (show all 416)
UniProtKB/Swiss-Prot genetic disease variations for Otopalatodigital Syndrome, Type Ii:74
Copy number variations for Otopalatodigital Syndrome, Type Ii from CNVD:7
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Search
GEO
for disease gene expression data for Otopalatodigital Syndrome, Type Ii.
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