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Items: 14

1.

Townes-Brocks syndrome 1

Townes-Brocks syndrome (TBS) is characterized by the triad of imperforate anus (84%), dysplastic ears (87%; overfolded superior helices and preauricular tags; frequently associated with sensorineural and/or conductive hearing impairment [65%]), and thumb malformations (89%; triphalangeal thumbs, duplication of the thumb [preaxial polydactyly], and rarely hypoplasia of the thumbs). Renal impairment (42%), including end-stage renal disease (ESRD), may occur with or without structural abnormalities (mild malrotation, ectopia, horseshoe kidney, renal hypoplasia, polycystic kidneys, vesicoutereral reflux). Congenital heart disease occurs in 25%. Foot malformations (52%; flat feet, overlapping toes) and genitourinary malformations (36%) are common. Intellectual disability occurs in approximately 10% of individuals. Rare features include iris coloboma, Duane anomaly, Arnold-Chiari malformation type 1, and growth retardation. [from GeneReviews]

MedGen UID:
1635275
Concept ID:
C4551481
Disease or Syndrome
2.

Child syndrome

The NSDHL-related disorders include: CHILD (congenital hemidysplasia with ichthyosiform nevus and limb defects) syndrome, an X-linked condition that is usually male lethal during gestation and thus predominantly affects females; and CK syndrome, an X-linked disorder that affects males. CHILD syndrome is characterized by unilateral distribution of ichthyosiform (yellow scaly) skin lesions and ipsilateral limb defects that range from shortening of the metacarpals and phalanges to absence of the entire limb. Intellect is usually normal. The ichthyosiform skin lesions are usually present at birth or in the first weeks of life; new lesions can develop in later life. Nail changes are also common. The heart, lung, and kidneys can also be involved. CK syndrome (named for the initials of the original proband) is characterized by mild to severe cognitive impairment and behavior problems (aggression, attention deficit hyperactivity disorder, and irritability). All affected males reported have developed seizures in infancy and have cerebral cortical malformations and microcephaly. All have distinctive facial features, a thin habitus, and relatively long, thin fingers and toes. Some have scoliosis and kyphosis. Strabismus is common. Optic atrophy is also reported. [from GeneReviews]

MedGen UID:
82697
Concept ID:
C0265267
Disease or Syndrome
3.

Feingold syndrome type 1

Feingold syndrome 1 (referred to as FS1 in this GeneReview) is characterized by digital anomalies (shortening of the 2nd and 5th middle phalanx of the hand, clinodactyly of the 5th finger, syndactyly of toes 2-3 and/or 4-5, thumb hypoplasia), microcephaly, facial dysmorphism (short palpebral fissures and micrognathia), gastrointestinal atresias (primarily esophageal and/or duodenal), and mild-to-moderate learning disability. [from GeneReviews]

MedGen UID:
1637716
Concept ID:
C4551774
Disease or Syndrome
4.

Synpolydactyly type 1

Synpolydactyly (SPD), or syndactyly type II, is defined as a connection between the middle and ring fingers and fourth and fifth toes, variably associated with postaxial polydactyly in the same digits. Minor local anomalies and various metacarpal or metatarsal abnormalities may be present (summary by Merlob and Grunebaum, 1986). In some families with SPD, the foot anomalies are characterized by preaxial as well as postaxial polydactyly, and appear to be fully penetrant. The more severe features of classic SPD, involving 3/4 synpolydactyly in the hands and 4/5 synpolydactyly in the feet, also occur, but at reduced penetrance. This foot phenotype is not seen in patients with classic SPD due to HOXD13 polyalanine tract expansions (Goodman et al., 1998). Malik (2012) reviewed the syndactylies, noting that the extreme phenotypic heterogeneity observed in SPD families consists of approximately 18 clinical variants that can be 'lumped' into 3 categories: typical SPD features, minor variants, and unusual phenotypes. Genetic Heterogeneity of Synpolydactyly See also SPD2 (608180), caused by mutation in the fibulin-1 gene (FBLN1; 135820) on chromosome 22q13, and SPD3 (610234), which has been mapped to chromosome 14q11.2-q12. [from OMIM]

MedGen UID:
1809573
Concept ID:
C5574994
Congenital Abnormality
5.

Joubert syndrome 20

Classic Joubert syndrome (JS) is characterized by three primary findings: A distinctive cerebellar and brain stem malformation called the molar tooth sign (MTS). Hypotonia. Developmental delays. Often these findings are accompanied by episodic tachypnea or apnea and/or atypical eye movements. In general, the breathing abnormalities improve with age, truncal ataxia develops over time, and acquisition of gross motor milestones is delayed. Cognitive abilities are variable, ranging from severe intellectual disability to normal. Additional findings can include retinal dystrophy, renal disease, ocular colobomas, occipital encephalocele, hepatic fibrosis, polydactyly, oral hamartomas, and endocrine abnormalities. Both intra- and interfamilial variation are seen. [from GeneReviews]

MedGen UID:
767149
Concept ID:
C3554235
Disease or Syndrome
6.

Jawad syndrome

Jawad syndrome (JWDS) is an autosomal recessive disorder characterized by congenital microcephaly, moderate to severely impaired intellectual development, and digital malformations including phalangeal joint swelling, clinodactyly, polydactyly, syndactyly, and total absence of nails (summary by Qvist et al., 2011). [from OMIM]

MedGen UID:
810673
Concept ID:
C0796063
Disease or Syndrome
7.

Pelviscapular dysplasia

Syndrome with characteristics of pelviscapular dysplasia with epiphyseal abnormalities, congenital dwarfism and facial dysmorphism. The facial dysmorphism has manifestations of frontal bossing, hypertelorism, narrow palpebral fissures, deep-set eyes, strabismus, low-set posteriorly rotated and malformed ears, dysplasia of conchae, a small chin, a short neck with redundant skin folds, and a low hairline. Intelligence may vary from normal to moderately impaired. Radiographic features comprise aplasia of the body of the scapula, hypoplasia of the iliac bone, humeroradial synostosis, dislocation of the femoral heads, and moderate brachydactyly. Mutations in the TBX15 gene have been identified as potentially causative. Pelviscapular dysplasia is phenotypically similar to pelvis-shoulder dysplasia. [from SNOMEDCT_US]

MedGen UID:
342400
Concept ID:
C1850040
Disease or Syndrome
8.

Intellectual disability, autosomal recessive 5

Any autosomal recessive non-syndromic intellectual disability in which the cause of the disease is a mutation in the NSUN2 gene. [from MONDO]

MedGen UID:
370849
Concept ID:
C1970199
Mental or Behavioral Dysfunction
9.

Syndactyly-telecanthus-anogenital and renal malformations syndrome

Syndrome with the association of toe syndactyly, facial dysmorphism including telecanthus and a broad nasal tip, urogenital malformations and anal atresia. Around ten cases have been reported so far. The syndrome is caused by mutations in the FAM58A gene (located on the X chromosome) encoding a protein of unknown function. [from SNOMEDCT_US]

MedGen UID:
394424
Concept ID:
C2678045
Congenital Abnormality; Disease or Syndrome
10.

Syndactyly type 5

A very rare congenital limb malformation with characteristics of postaxial syndactyly of hands and feet, associated with metacarpal and metatarsal fusion of fourth and fifth digits. So far, less than ten reports have been described in the literature. Soft tissue syndactyly (involving the third and fourth fingers and the second and third toes) may be present. The locus associated with SD5 maps to 2q31-q32. Mutations in the HOXD13 gene may be causative. The condition is inherited as an autosomal dominant trait. [from SNOMEDCT_US]

MedGen UID:
350010
Concept ID:
C1861348
Congenital Abnormality
11.

Ectodermal dysplasia-syndactyly syndrome 1

Ectodermal dysplasia-syndactyly syndrome (EDSS) is characterized by sparse to absent scalp hair, eyebrows, and eyelashes, hypoplastic nails, tooth enamel hypoplasia, conical-shaped teeth, palmoplantar keratoderma, and partial cutaneous syndactyly (summary by Raza et al., 2015). Genetic Heterogeneity of Ectodermal Dysplasia-Syndactyly Syndrome Ectodermal dysplasia-syndactyly syndrome-2 (EDSS2; 613576) maps to chromosome 7p21-p14. [from OMIM]

MedGen UID:
462157
Concept ID:
C3150807
Disease or Syndrome
12.

Split-foot malformation-mesoaxial polydactyly syndrome

Split-foot malformation with mesoaxial polydactyly (SFMMP) is characterized by a split-foot defect and nail abnormalities of the hands, as well as hearing loss in some patients (Spielmann et al., 2016). [from OMIM]

MedGen UID:
1798910
Concept ID:
C5567487
Disease or Syndrome
13.

Aurocephalosyndactyly

MedGen UID:
354732
Concept ID:
C1862380
Disease or Syndrome
14.

4-5 toe syndactyly

Syndactyly with fusion of toes four and five. [from HPO]

MedGen UID:
324891
Concept ID:
C1837836
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