Depressed nasal bridge, and Smooth philtrum

1qter deletion syndrome is a chromosomal anomaly characterized by an intellectual deficiency, progressive microcephaly, seizures, growth delay, distinct facial dysmorphic features and various midline defects including cardiac, corpus callosum, gastro-oesophalgeal and urogenital anomalies.

DISTAL MONOSOMY 1Q Is also known as telomeric deletion 1q|distal deletion 1q|monosomy 1qter

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Microcephaly

SOURCES: ORPHANET MENDELIAN

Intellectual developmental disorder with neuropsychiatric features is an autosomal recessive disorder characterized by moderate intellectual disability, relatively mild seizures, and neuropsychiatric abnormalities, such as anxiety, obsessive-compulsive behavior, and autistic features. Mild facial dysmorphic features may also be present (summary by Srour et al., 2017).

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

SOURCES: OMIM MENDELIAN

BLEPHAROPHIMOSIS-INTELLECTUAL DISABILITY SYNDROME, MKB TYPE Is also known as bmrs, mkb type|bmrs, maat-kievit-brunner type|blepharophimosis-intellectual disability syndrome, maat-kievit-brunner type|blepharophimosis-mental retardation syndrome, maat-kievit-brunner type|x-linked ohdo syndrome

• Intellectual disability
• Global developmental delay
• Hearing impairment
• Micrognathia
• Cryptorchidism

SOURCES: ORPHANET OMIM MENDELIAN

HCFP3 is an autosomal recessive congenital cranial dysinnervation disorder characterized by isolated dysfunction of the seventh cranial nerve resulting in facial palsy. Additional features may include orofacial anomalies, such as smooth philtrum, lagophthalmos, swallowing difficulties, and dysarthria, as well as hearing loss. There is some phenotypic overlap with Moebius syndrome (see, e.g., {157900}), but patients with HCFP usually retain full eye motility or have esotropia without paralysis of the sixth cranial nerve (summary by Vogel et al., 2016).For a phenotypic description and a discussion of genetic heterogeneity of hereditary congenital facial paresis, see {601471}.

• Hearing impairment
• Micrognathia
• Strabismus
• Sensorineural hearing impairment
• Abnormal facial shape

SOURCES: OMIM MENDELIAN

Early infantile epileptic encephalopathy-64 is a neurodevelopmental disorder characterized by onset of seizures usually in the first year of life and associated with intellectual disability, poor motor development, and poor or absent speech. Additional features include hypotonia, abnormal movements, and nonspecific dysmorphic features. The severity is variable: some patients are unable to speak, walk, or interact with others as late as the teenage years, whereas others may have some comprehension (summary by Straub et al., 2018).For a general phenotypic description and a discussion of genetic heterogeneity of EIEE, see EIEE1 (OMIM ).

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

SOURCES: OMIM MENDELIAN

Intellectual disability-facial dysmorphism syndrome due to SETD5 haploinsufficiency is a rare, syndromic intellectual disability characterized by intellectual disability of various severity, hypotonia, feeding difficulties, dysmorphic features, autism and behavioral issues. Growth retardation, congenital heart anomalies, gastrointestinal and genitourinary defects have been rarely associated.

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

SOURCES: ORPHANET OMIM MENDELIAN

Al Kaissi syndrome is an autosomal recessive developmental disorder characterized by growth retardation, spine malformation, particularly of the cervical spine, dysmorphic facial features, and delayed psychomotor development with moderate to severe intellectual disability (summary by Windpassinger et al., 2017).

AL KAISSI SYNDROME; ALKAS Is also known as growth retardation, spine malformation, dysmorphic facies, and developmental delay

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

SOURCES: OMIM MENDELIAN

Cornelia de Lange syndrome is a multisystem developmental disorder characterized by distinctive facial dysmorphism, pre- and postnatal growth failure, delayed psychomotor development and intellectual disability, hypertrichosis, and sometimes distal limb malformations (summary by Gil-Rodriguez et al., 2015).For a phenotypic description and a discussion of genetic heterogeneity of Cornelia de Lange syndrome, see {122470}.

• Intellectual disability
• Global developmental delay
• Short stature
• Hearing impairment
• Microcephaly

SOURCES: OMIM MENDELIAN

Ayme-Gripp syndrome is a clinically homogeneous phenotype characterized by congenital cataracts, sensorineural hearing loss, intellectual disability, seizures, brachycephaly, a distinctive flat facial appearance, and reduced growth (Niceta et al., 2015).

AYME-GRIPP SYNDROME; AYGRP Is also known as cataracts, congenital, with sensorineural deafness, down syndrome-like facial appearance, short stature, and mental retardation

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Hearing impairment

SOURCES: OMIM MENDELIAN

Ornithine transcarbamylase deficiency is an X-linked inborn error of metabolism of the urea cycle which causes hyperammonemia. The disorder is treatable with supplemental dietary arginine and low protein diet.Urea cycle disorders are characterized by the triad of hyperammonemia, encephalopathy, and respiratory alkalosis. Five disorders involving different defects in the biosynthesis of the enzymes of the urea cycle have been described: OTC deficiency, carbamyl phosphate synthetase deficiency (OMIM ), argininosuccinate synthetase deficiency, or citrullinemia (OMIM ), argininosuccinate lyase deficiency (OMIM ), and arginase deficiency (OMIM ).

ORNITHINE TRANSCARBAMYLASE DEFICIENCY, HYPERAMMONEMIA DUE TO Is also known as ornithine carbamoyltransferase deficiency|otc deficiency

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

SOURCES: ORPHANET OMIM MENDELIAN