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1.

Craniofrontonasal syndrome

Craniofrontonasal syndrome is an X-linked developmental disorder that shows paradoxically greater severity in heterozygous females than in hemizygous males. Females have frontonasal dysplasia, craniofacial asymmetry, craniosynostosis, bifid nasal tip, grooved nails, wiry hair, and abnormalities of the thoracic skeleton, whereas males typically show only hypertelorism (Twigg et al., 2004; Wieland et al., 2004). [from OMIM]

MedGen UID:
65095
Concept ID:
C0220767
Disease or Syndrome
2.

Oculofaciocardiodental syndrome

Oculofaciocardiodental (OFCD) syndrome is a condition that affects the development of the eyes (oculo-), facial features (facio-), heart (cardio-) and teeth (dental). This condition occurs only in females.

The eye abnormalities associated with OFCD syndrome can affect one or both eyes. Many people with this condition are born with eyeballs that are abnormally small (microphthalmia). Other eye problems can include clouding of the lens (cataract) and a higher risk of glaucoma, an eye disease that increases the pressure in the eye. These abnormalities can lead to vision loss or blindness.

People with OFCD syndrome often have a long, narrow face with distinctive facial features, including deep-set eyes and a broad nasal tip that is divided by a cleft. Some affected people have an opening in the roof of the mouth called a cleft palate.

Heart defects are another common feature of OFCD syndrome. Babies with this condition may be born with a hole between two chambers of the heart (an atrial or ventricular septal defect) or a leak in one of the valves that controls blood flow through the heart (mitral valve prolapse).

Teeth with very large roots (radiculomegaly) are characteristic of OFCD syndrome. Additional dental abnormalities can include delayed loss of primary (baby) teeth, missing or abnormally small teeth, misaligned teeth, and defective tooth enamel. [from MedlinePlus Genetics]

MedGen UID:
337547
Concept ID:
C1846265
Disease or Syndrome
3.

Microcephaly 6, primary, autosomal recessive

People with MCPH usually have few or no other features associated with the condition. Some have a narrow, sloping forehead; mild seizures; problems with attention or behavior; or short stature compared to others in their family. The condition typically does not affect any other major organ systems or cause other health problems.

MCPH causes intellectual disability, which is typically mild to moderate and does not become more severe with age. Most affected individuals have delayed speech and language skills. Motor skills, such as sitting, standing, and walking, may also be mildly delayed.

Infants with MCPH have an unusually small head circumference compared to other infants of the same sex and age. Head circumference is the distance around the widest part of the head, measured by placing a measuring tape above the eyebrows and ears and around the back of the head. Affected infants' brain volume is also smaller than usual, although they usually do not have any major abnormalities in the structure of the brain. The head and brain grow throughout childhood and adolescence, but they continue to be much smaller than normal.

Autosomal recessive primary microcephaly (often shortened to MCPH, which stands for "microcephaly primary hereditary") is a condition in which infants are born with a very small head and a small brain. The term "microcephaly" comes from the Greek words for "small head." [from MedlinePlus Genetics]

MedGen UID:
330770
Concept ID:
C1842109
Disease or Syndrome
4.

Oculotrichoanal syndrome

FREM1 autosomal recessive disorders include: Manitoba oculotrichoanal (MOTA) syndrome, bifid nose with or without anorectal and renal anomalies (BNAR syndrome), and isolated congenital anomalies of kidney and urinary tract (CAKUT). MOTA syndrome is characterized by an aberrant hairline (unilateral or bilateral wedge-shaped extension of the anterior hairline from the temple region to the ipsilateral eye) and anomalies of the eyes (widely spaced eyes, anophthalmia/microphthalmia and/or cryptophthalmos, colobomas of the upper eyelid, and corneopalpebral synechiae), nose (bifid or broad nasal tip), abdominal wall (omphalocele or umbilical hernia), and anus (stenosis and/or anterior displacement of the anal opening). The manifestations and degree of severity vary even among affected members of the same family. Growth and psychomotor development are normal. BNAR syndrome is characterized by a bifid or wide nasal tip, anorectal anomalies, and renal malformations (e.g., renal agenesis, renal dysplasia). Typically the eye manifestations of MOTA syndrome are absent. FREM1-CAKUT was identified in one individual with bilateral vesicoureteral reflux (VUR) and a second individual with VUR and renal hypodysplasia. [from GeneReviews]

MedGen UID:
383680
Concept ID:
C1855425
Disease or Syndrome
5.

Frontorhiny

A distinct syndromic type of frontonasal malformation with characteristics of hypertelorism, wide nasal bridge, broad columella, widened philtrum, widely separated narrow nares, poor development of nasal tip, midline notch of the upper alveolus, columella base swellings and a low hairline. Additional features reported in some include upper eyelid ptosis and midline dermoid cysts of craniofacial structures and philtral pits or rugose folding behind the ears. [from SNOMEDCT_US]

MedGen UID:
1803615
Concept ID:
C5574965
Congenital Abnormality
6.

Frontonasal dysplasia with alopecia and genital anomaly

Frontonasal dysplasia-2 (FND2) is an autosomal recessive disorder characterized by variable degrees of alopecia, skull defects, hypertelorism, depressed nasal bridge and ridge with notched alae nasi, and abnormal central nervous system findings (summary by Kariminejad et al., 2014). [from OMIM]

MedGen UID:
462053
Concept ID:
C3150703
Disease or Syndrome
7.

Ogden syndrome

Ogden syndrome (OGDNS) is an X-linked neurodevelopmental disorder characterized by postnatal growth failure, severely delayed psychomotor development, variable dysmorphic features, and hypotonia. Many patients also have cardiac malformations or arrhythmias (summary by Popp et al., 2015). [from OMIM]

MedGen UID:
477078
Concept ID:
C3275447
Disease or Syndrome
8.

Au-Kline syndrome

Au-Kline syndrome is characterized by developmental delay and hypotonia with moderate-to-severe intellectual disability, and typical facial features that include long palpebral fissures, ptosis, shallow orbits, large and deeply grooved tongue, broad nose with a wide nasal bridge, and downturned mouth. There is frequently variable autonomic dysfunction (gastrointestinal dysmotility, high pain threshold, heat intolerance, recurrent fevers, abnormal sweating). Congenital heart disease, hydronephrosis, palate abnormalities, and oligodontia are also reported in the majority of affected individuals. Additional complications can include craniosynostosis, feeding difficulty, vision issues, osteopenia, and other skeletal anomalies. [from GeneReviews]

MedGen UID:
900671
Concept ID:
C4225274
Disease or Syndrome
9.

Acromelic frontonasal dysostosis

Verloes et al. (1992) described a rare variant of frontonasal dysplasia (see FND1, 136760), designated acromelic frontonasal dysplasia (AFND), in which similar craniofacial anomalies are associated with variable central nervous system malformations and limb defects including tibial hypoplasia/aplasia, talipes equinovarus, and preaxial polydactyly of the feet. [from OMIM]

MedGen UID:
350933
Concept ID:
C1863616
Disease or Syndrome
10.

Autosomal dominant intellectual disability-craniofacial anomalies-cardiac defects syndrome

Arboleda-Tham syndrome (ARTHS) is an autosomal dominant disorder with the core features of impaired intellectual development, speech delay, microcephaly, cardiac anomalies, and gastrointestinal complications (summary by Kennedy et al., 2019). [from OMIM]

MedGen UID:
903767
Concept ID:
C4225396
Disease or Syndrome
11.

Mohr syndrome

Orofaciodigital syndrome II (OFD2), also known as Mohr syndrome, is characterized by cleft lip/palate, lobulated tongue with nodules, dental anomalies including tooth agenesis, maxillary hypoplasia, conductive hearing loss, and poly-, syn-, and brachydactyly. Mesomelic shortening of the limbs has also been observed (Mohr, 1941; Gorlin, 1982; Monroe et al., 2016). [from OMIM]

MedGen UID:
10077
Concept ID:
C0026363
Disease or Syndrome
12.

Elsahy-Waters syndrome

The core phenotype of Elsahy-Waters syndrome consists of brachycephaly, facial asymmetry, marked hypertelorism, proptosis, blepharochalasis, midface hypoplasia, broad nose with concave nasal ridge, and prognathism; radicular dentin dysplasia with consequent obliterated pulp chambers, apical translucent cysts, recurrent infections, and early loss of teeth; vertebral fusions, particularly at C2-C3; and moderate mental retardation. Skin wrinkling over the glabellar region seems common, and in males, hypospadias has always been present. Inter- and intrafamilial variability has been reported regarding the presence of vertebral fusions, hearing loss, and dentigerous cysts. Midface hypoplasia, facial asymmetry, progressive dental anomalies, and impaired cognitive development become more evident in adulthood (summary by Castori et al., 2010). [from OMIM]

MedGen UID:
923028
Concept ID:
C0809936
Disease or Syndrome
13.

Zimmermann-Laband syndrome 2

Zimmerman-Laband syndrome is a developmental disorder characterized by facial dysmorphism with gingival enlargement, bulbous soft nose, and think floppy ears, nail aplasia or hypoplasia, hypertrichosis, joint hypertextensibility, hepato(spleno)megaly, and impaired intellectual development with or without epilepsy (summary by Kortum et al., 2015). For a general phenotypic description and a discussion of genetic heterogeneity of Zimmermann-Laband syndrome, see ZLS1 (135500). [from OMIM]

MedGen UID:
897567
Concept ID:
C4225321
Disease or Syndrome
14.

17q11.2 microduplication syndrome

Syndrome that has characteristics of dysmorphic features and intellectual deficit. It has been described in seven patients within one family. 17q11.2 microduplication encompasses the NF1 region. The underlying mechanism may be non-allelic homologous recombination. The study of pedigree suggests that this microduplication segregates within the family for at least two generations. Two patients displayed a normal clinical presentation, suggesting an autosomal dominant pattern of inheritance with incomplete penetrance. [from SNOMEDCT_US]

MedGen UID:
501218
Concept ID:
C3495679
Disease or Syndrome
15.

Intellectual disability, X-linked 104

Any non-syndromic X-linked intellectual disability in which the cause of the disease is a mutation in the FRMPD4 gene. [from MONDO]

MedGen UID:
934784
Concept ID:
C4310817
Disease or Syndrome
16.

Autosomal dominant omodysplasia

Omodysplasia-2 (OMOD2) is a rare autosomal dominant skeletal dysplasia characterized by shortened humeri, dislocated radial heads, shortened first metacarpals, craniofacial dysmorphism, and variable genitourinary anomalies (Saal et al., 2015). For a discussion of genetic heterogeneity of OMOD, see 258315. [from OMIM]

MedGen UID:
413823
Concept ID:
C2750355
Disease or Syndrome
17.

Orofaciodigital syndrome IX

Syndrome with characteristics of highly arched palate with bifid tongue and bilateral supernumerary lower canines, hamartomatous tongue, multiple frenula, hypertelorism, telecanthus, strabismus, broad and/or bifid nasal tip, short stature, bifid hallux, forked metatarsal, poly and syndactyly, mild intellectual deficit and specific retinal abnormalities (bilateral optic disc coloboma and retinal dysplasia with partial detachment). Less than ten cases have been described in the literature. The causative gene has not yet been identified. [from SNOMEDCT_US]

MedGen UID:
162908
Concept ID:
C0796102
Disease or Syndrome
18.

Even-plus syndrome

EVEN-plus syndrome (EVPLS) is characterized by prenatal-onset short stature, vertebral and epiphyseal changes, microtia, midface hypoplasia with flat nose and triangular nares, cardiac malformations, and other findings including anal atresia, hypodontia, and aplasia cutis. The features overlap those reported in patients with CODAS syndrome (600373; Royer-Bertrand et al., 2015). [from OMIM]

MedGen UID:
904613
Concept ID:
C4225180
Disease or Syndrome
19.

Chromosome 1p36 deletion syndrome, proximal

Proximal 1p36 deletion syndrome is a multisystem developmental disorder characterized by global developmental delay with impaired intellectual development, poor overall growth with microcephaly, axial hypotonia, and dysmorphic facial features. Most patients have congenital cardiac malformations or cardiac dysfunction. Additional more variable features may include distal skeletal anomalies, seizures, and cleft palate. The phenotype shows some overlap with distal chromosome 1p36 deletion syndrome (summary by Kang et al., 2007). [from OMIM]

MedGen UID:
1794324
Concept ID:
C5562114
Disease or Syndrome
20.

Intellectual disability-balding-patella luxation-acromicria syndrome

This syndrome has characteristics of severe intellectual deficit, patella luxations, acromicria, hypogonadism, facial dysmorphism (including midface hypoplasia and premature frontotemporal balding). It has been described in three unrelated males. [from SNOMEDCT_US]

MedGen UID:
401129
Concept ID:
C1866985
Disease or Syndrome
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