Microcephaly, 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 disability
• Seizures
• Global developmental delay
• Microcephaly
• Hypertelorism

SOURCES: OMIM MENDELIAN

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

SOURCES: MESH OMIM MENDELIAN

Ververi-Brady syndrome is a disorder characterized by mild developmental delay, mild intellectual disability and speech delay, and mild dysmorphic facial features. Affected individuals can usually attend mainstream schools with support, and may also show autistic features (summary by Ververi et al., 2018).

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

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

Severe intellectual disability-progressive spastic diplegia syndrome is a rare, genetic, syndromic intellectual disability disorder characterized by intellectual disability, significant motor delay, severe speech impairment, early-onset truncal hypotonia with progressive distal hypertonia/spasticity, microcephaly, and behavioral anomalies (autistic features, aggression or auto-aggressive behavior, sleep disturbances). Variable facial dysmorphism includes broad nasal tip with small alae nasi, long and/or flat philtrum, thin upper lip vermillion. Visual impairment (strabismus, hyperopia, myopia) is commonly associated.

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

SOURCES: ORPHANET OMIM MENDELIAN

Kohlschütter-Tönz syndrome (KTS) is a genetically heterogeneous autosomal recessive syndrome characterized by the triad of amelogenesis imperfect, infantile onset epilepsy, intellectual disability with or without regression and dementia.

AMELOCEREBROHYPOHIDROTIC SYNDROME Is also known as epilepsy and yellow teeth|kohlschutter syndrome|kohlschutter-tonz syndrome|epilepsy, dementia, and amelogenesis imperfecta|epilepsy-dementia-amelogenesis imperfecta syndrome

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

SOURCES: ORPHANET OMIM MESH MENDELIAN

Peroxisomal fatty acyl-CoA reductase-1 disorder is an autosomal recessive disorder characterized by onset in infancy of severely delayed psychomotor development, growth retardation with microcephaly, and seizures. Some patients may have congenital cataracts and develop spasticity later in childhood. Biochemical studies tend to show decreased plasmalogen, consistent with a peroxisomal defect. The disorder is reminiscent of rhizomelic chondrodysplasia punctata (see, e.g., RCDP1, {215100}), although the characteristic skeletal abnormalities observed in RCDP are absent (Buchert et al., 2014).

SEVERE INTELLECTUAL DISABILITY-EPILEPSY-CATARACT SYNDROME DUE TO FATTY ACYL-COA REDUCTASE 1 DEFICIENCY Is also known as severe intellectual disability-epilepsy-cataract syndrome due to peroxisomal disorder|severe intellectual disability-epilepsy-cataract syndrome due to far1 deficiency

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

SOURCES: ORPHANET OMIM MENDELIAN

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

SOURCES: OMIM MENDELIAN

Holoprosencephaly (HPE) is the most commonly occurring congenital structural forebrain anomaly in humans. HPE is associated with mental retardation and craniofacial malformations. Considerable heterogeneity in the genetic causes of HPE has been demonstrated (Ming et al., 2002).

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

SOURCES: MESH OMIM MENDELIAN