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Items: 12

1.

Weaver syndrome

EZH2-related overgrowth includes EZH2-related Weaver syndrome at one end of the spectrum and tall stature at the other. Although most individuals diagnosed with a heterozygous EZH2 pathogenic variant have been identified because of a clinical suspicion of Weaver syndrome, a minority have been identified through molecular genetic testing of family members of probands or individuals with overgrowth who did not have a clinical diagnosis of Weaver syndrome. Thus, the extent of the phenotypic spectrum associated with a heterozygous EZH2 pathogenic variant is not yet known. Weaver syndrome is characterized by tall stature, variable intellect (ranging from normal intellect to severe intellectual disability), characteristic facial appearance, and a range of associated clinical features including advanced bone age, poor coordination, soft doughy skin, camptodactyly of the fingers and/or toes, umbilical hernia, abnormal tone, and hoarse low cry in infancy. Brain MRI has identified abnormalities in a few individuals with EZH2-related overgrowth. Neuroblastoma occurs at a slightly increased frequency in individuals with a heterozygous EZH2 pathogenic variant but data are insufficient to determine absolute risk. There is currently no evidence that additional malignancies (including hematologic malignancies) occur with increased frequency. [from GeneReviews]

MedGen UID:
120511
Concept ID:
C0265210
Disease or Syndrome
2.

Freeman-Sheldon syndrome

Freeman-Sheldon syndrome (FSS), or DA2A, is phenotypically similar to DA1. In addition to contractures of the hands and feet, FSS is characterized by oropharyngeal abnormalities, scoliosis, and a distinctive face that includes a very small oral orifice (often only a few millimeters in diameter at birth), puckered lips, and an H-shaped dimple of the chin; hence, FSS has been called 'whistling face syndrome.' The limb phenotypes of DA1 and FSS may be so similar that they can only be distinguished by the differences in facial morphology (summary by Bamshad et al., 2009). For a general phenotypic description and a discussion of genetic heterogeneity of distal arthrogryposis, see DA1 (108120). [from OMIM]

MedGen UID:
120516
Concept ID:
C0265224
Disease or Syndrome
3.

SHORT syndrome

SHORT syndrome is a mnemonic for short stature, hyperextensibility, ocular depression (deeply set eyes), Rieger anomaly, and teething delay. It is now recognized that the features most consistently observed in SHORT syndrome are mild intrauterine growth restriction (IUGR); mild to moderate short stature; partial lipodystrophy (evident in the face, and later in the chest and upper extremities, often sparing the buttocks and legs); and a characteristic facial gestalt. Insulin resistance may be evident in mid-childhood or adolescence, although diabetes mellitus typically does not develop until early adulthood. Other frequent features include Axenfeld-Rieger anomaly or related ocular anterior chamber dysgenesis, delayed dentition and other dental issues, and sensorineural hearing loss. [from GeneReviews]

MedGen UID:
164212
Concept ID:
C0878684
Disease or Syndrome
4.

Branchiooculofacial syndrome

The branchiooculofacial syndrome (BOFS) is characterized by: branchial (cervical or infra- or supra-auricular) skin defects that range from barely perceptible thin skin or hair patch to erythematous "hemangiomatous" lesions to large weeping erosions; ocular anomalies that can include microphthalmia, anophthalmia, coloboma, and nasolacrimal duct stenosis/atresia; and facial anomalies that can include ocular hypertelorism or telecanthus, broad nasal tip, upslanted palpebral fissures, cleft lip or prominent philtral pillars that give the appearance of a repaired cleft lip (formerly called "pseudocleft lip") with or without cleft palate, upper lip pits, and lower facial weakness (asymmetric crying face or partial 7th cranial nerve weakness). Malformed and prominent pinnae and hearing loss from inner ear and/or petrous bone anomalies are common. Intellect is usually normal. [from GeneReviews]

MedGen UID:
91261
Concept ID:
C0376524
Disease or Syndrome
5.

Kabuki syndrome

Kabuki syndrome (KS) is characterized by typical facial features (long palpebral fissures with eversion of the lateral third of the lower eyelid; arched and broad eyebrows; short columella with depressed nasal tip; large, prominent, or cupped ears), minor skeletal anomalies, persistence of fetal fingertip pads, mild-to-moderate intellectual disability, and postnatal growth deficiency. Other findings may include: congenital heart defects, genitourinary anomalies, cleft lip and/or palate, gastrointestinal anomalies including anal atresia, ptosis and strabismus, and widely spaced teeth and hypodontia. Functional differences can include: increased susceptibility to infections and autoimmune disorders, seizures, endocrinologic abnormalities (including isolated premature thelarche in females), feeding problems, and hearing loss. [from GeneReviews]

MedGen UID:
162897
Concept ID:
C0796004
Congenital Abnormality
6.

Blepharophimosis-impaired intellectual development syndrome

Blepharophimosis-impaired intellectual development syndrome (BIS) is a congenital disorder characterized by a distinct facial appearance with blepharophimosis and global development delay. Affected individuals have delayed motor skills, sometimes with inability to walk, and impaired intellectual development with poor or absent speech; some patients show behavioral abnormalities. There are recognizable facial features, including epicanthal folds, sparse eyebrows, broad nasal bridge, short nose with downturned tip, and open mouth with thin upper lip. Other more variable features include distal skeletal anomalies, feeding difficulties with poor growth, respiratory infections, and hypotonia with peripheral spasticity (summary by Cappuccio et al., 2020). [from OMIM]

MedGen UID:
1779966
Concept ID:
C5443984
Disease or Syndrome
7.

Whistling face syndrome, recessive form

Whistling face syndrome is characterized by an atypical facial appearance with anomalies of the hands and feet. Most cases show autosomal dominant inheritance: see distal arthrogryposis 2A (DA2A; 193700). There are rare reports of presumably autosomal recessive inheritance (summary by Altunhan et al., 2010). [from OMIM]

MedGen UID:
376364
Concept ID:
C1848470
Disease or Syndrome
8.

Microcephaly, facial dysmorphism, renal agenesis, and ambiguous genitalia syndrome

MFRG is an autosomal recessive syndrome in which microcephaly, unilateral renal agenesis, ambiguous genitalia, and facial dysmorphisms, including severe micrognathia, are observed in most patients. Variable brain, cardiac, and skeletal anomalies are present, including corpus callosum agenesis or dysgenesis, lissencephaly, atrial and ventricular septal defects, patent ductus arteriosus, hypoplastic right ventricle, and joint contractures (Shaheen et al., 2016). [from OMIM]

MedGen UID:
1648412
Concept ID:
C4748348
Disease or Syndrome
9.

Hemifacial myohyperplasia

Hemifacial myohyperplasia (HFMH) is a rare cause of facial asymmetry exclusively involving facial muscles (summary by Bayard et al., 2023). [from OMIM]

MedGen UID:
339781
Concept ID:
C1847521
Congenital Abnormality
10.

Flat face-microstomia-ear anomaly syndrome

A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of dysmorphic facial features including high forehead, elongated and flattened midface, arched and sparse eyebrows, short palpebral fissures, telecanthus, long nose with hypoplastic nostrils, long philtrum, high and narrow palate and microstomia with downturned corners. Ears are characteristically malformed, large, low-set and posteriorly rotated and nasal speech is associated. [from SNOMEDCT_US]

MedGen UID:
356655
Concept ID:
C1866962
Disease or Syndrome
11.

Intellectual developmental disorder, autosomal recessive 80, with variant lissencephaly

Autosomal recessive intellectual developmental disorder-80 with variant lissencephaly (MRT80) is characterized by global developmental delay with mildly to moderately impaired intellectual development and behavioral abnormalities. Speech delay and motor abnormalities, such as hypotonia, may also be present. Brain imaging shows lissencephaly with pachygyria and mild cortical thickening in the frontotemporal lobes (Uctepe et al., 2024). [from OMIM]

MedGen UID:
1850178
Concept ID:
C5882733
Disease or Syndrome
12.

Dimple chin

A persistent midline depression of the skin over the fat pad of the chin. [from HPO]

MedGen UID:
1370532
Concept ID:
C4317152
Anatomical Abnormality
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