Downslanted palpebral fissures, and Ambiguous genitalia

The Opitz GBBB syndrome is a congenital midline malformation syndrome characterized by hypertelorism, hypospadias, cleft lip/palate, laryngotracheoesophageal abnormalities, imperforate anus, developmental delay, and cardiac defects (So et al., 2005).This disorder was first reported as 2 separate entities, BBB syndrome and G syndrome; subsequent reports of families in which the BBB and G syndromes segregated within a single kindred suggested that they represent a single entity. Genetic HeterogeneitySee also GBBB2 (OMIM ), caused by mutation in the SPECC1L gene (OMIM ) on chromosome 22q11.

OPITZ GBBB SYNDROME, TYPE I; GBBB1 Is also known as opitz bbbg syndrome, type i|opitz syndrome|os|opitz syndrome, x-linked|ogs1|hypertelorism-hypospadias syndrome|osx|telecanthus-hypospadias syndrome|opitz gbbb syndrome, x-linked|bbbg1|hypertelorism with esophageal abnormality and hypospadias|opitz-g syndr

• Intellectual disability
• Global developmental delay
• Hypertelorism
• Sensorineural hearing impairment
• Cleft palate

SOURCES: OMIM ORPHANET MENDELIAN

Filippi syndrome is characterised by microcephaly, cutaneous syndactyly of the fingers and toes, intellectual deficit, growth retardation and a characteristic facies (high and broad nasal bridge, thin alae nasi, micrognathia and a high frontal hairline). So far, less than 25 cases have been reported. Cryptorchidism, polydactyly, and teeth and hair anomalies may also be present. Transmission is autosomal recessive.

FILIPPI SYNDROME Is also known as scott craniodigital syndrome with mental retardation|syndactyly, type i, with microcephaly and mental retardation|type 1 syndactyly-microcephaly-intellectual disability syndrome

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Generalized hypotonia

SOURCES: OMIM ORPHANET MESH MENDELIAN

Desmosterolosis is a very rare sterol biosynthesis disorder characterized by multiple congenital anomalies, failure to thrive, and intellectual disability, with elevated levels of desmosterol.

• Intellectual disability
• Seizures
• Global developmental delay
• Microcephaly
• Growth delay

SOURCES: OMIM MESH ORPHANET MENDELIAN

Lathosterolosis is an extremely rare inborn error of sterol biosynthesis characterized by facial dysmorphism, congenital anomalies (including limb and kidney anomalies), failure to thrive, developmental delay and liver disease.

LATHOSTEROLOSIS Is also known as sc5d deficiency|sterol c5-desaturase deficiency

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Hearing impairment

SOURCES: MESH ORPHANET OMIM MENDELIAN

Mosaic variegated aneuploidy (MVA) syndrome is a chromosomal anomaly characterized by multiple mosaic aneuploidies that leads to a variety of phenotypic abnormalities and cancer predisposition.

MOSAIC VARIEGATED ANEUPLOIDY SYNDROME Is also known as warburton-anyane-yeboa syndrome

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Generalized hypotonia

SOURCES: ORPHANET OMIM MENDELIAN

Autosomal recessive Robinow syndrome is a severe skeletal dysplasia characterized by dysmorphic facial features, including frontal bossing, hypertelorism, and broad nose, short-limbed dwarfism, vertebral segmentation, and genital hypoplasia (summary by van Bokhoven et al., 2000). Genetic Heterogeneity of Robinow SyndromeSee also autosomal dominant Robinow syndrome-1 (DRS1 ), caused by mutation in the WNT5A gene (OMIM ) on chromosome 3p; DRS2 (OMIM ), caused by mutation in the DVL1 gene (OMIM ) on chromosome 1p36; and DRS3 (OMIM ), caused by mutation in the DVL3 gene (OMIM ) on chromosome 3q27.

ROBINOW SYNDROME, AUTOSOMAL RECESSIVE; RRS Is also known as costovertebral segmentation defect with mesomelia, formerly|covesdem syndrome, formerly

• Intellectual disability
• Global developmental delay
• Short stature
• Scoliosis
• Growth delay

SOURCES: OMIM MENDELIAN

Pallister-Hall syndrome (PHS), a pleiotropic autosomal dominant malformative disorder, is characterized by hypothalamic hamartoma, pituitary dysfunction, bifid epiglottis, polydactyly, and, more rarely, renal abnormalities and genitourinary malformations.

PALLISTER-HALL SYNDROME Is also known as hypothalamic hamartoblastoma syndrome

• Intellectual disability
• Global developmental delay
• Short stature
• Hypertelorism
• Cleft palate

SOURCES: ORPHANET MENDELIAN

Smith-Lemli-Opitz syndrome (SLOS) is characterized by multiple congenital anomalies, intellectual deficit, and behavioral problems.

SMITH-LEMLI-OPITZ SYNDROME Is also known as rutledge lethal multiple congenital anomaly syndrome|slos|lethal acrodysgenital syndrome|rsh syndrome|slo syndrome|7-dehydrocholesterol reductase deficiency|polydactyly, sex reversal, renal hypoplasia, and unilobar lung

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Generalized hypotonia

SOURCES: MESH OMIM ORPHANET MENDELIAN

Pontocerebellar hypoplasia type 7 (PCH7) is a novel very rare form of pontocerebellar hypoplasia (see this term) with unknown etiology and poor prognosis reported in four patients and is characterized clinically during the neonatal period by hypotonia, no palpable gonads, micropenis and from infancy by progressive microcephaly, apneic episodes, poor feeding, seizures and regression of penis. MRI demonstrates a pontocerebellar hypoplasia. PCH7 is expressed as PCH with 46,XY disorder of sex development (see this term) in individuals with XY karyotype, and may be expressed as PCH only in individuals with XX karyotype.

PONTOCEREBELLAR HYPOPLASIA TYPE 7 Is also known as pontocerebellar hypoplasia-46,xy disorder of sex development syndrome|pch7

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Microcephaly

SOURCES: OMIM ORPHANET MENDELIAN

Sifrim-Hitz-Weiss syndrome is an autosomal dominant intellectual disability syndrome associated with variable congenital defects affecting other systems, including cardiac, skeletal, and urogenital. Some patients may have short stature, enlarged head circumference, hearing loss, and nonspecific dysmorphic facial features (summary by Sifrim et al., 2016 and Weiss et al., 2016).

SIFRIM-HITZ-WEISS SYNDROME; SIHIWES Is also known as sifrim-hitz-weiss multiple congenital anomalies-mental retardation syndrome

• Intellectual disability
• Global developmental delay
• Short stature
• Generalized hypotonia
• Hearing impairment

SOURCES: OMIM MENDELIAN