Ataxia, and Clinodactyly

Cerebellar ataxia-hypogonadism syndrome is a very rare autosomal recessive neurodegenerative disorder characterized by the combination of progressive cerebellar ataxia with onset from early childhood to the fourth decade, and hypogonadotropic hypogonadism (delayed puberty and lack of secondary sex characteristics). Cerebellar ataxia-hypogonadism syndrome belongs to a clinical continuum of neurodegenerative disorders along with clinically overlapping disorders such as ataxia-hypogonadism-choroidal dystrophy syndrome (see this term).

CEREBELLAR ATAXIA-HYPOGONADISM SYNDROME Is also known as luteinizing hormone-releasing hormone deficiency with ataxia|gordon-holmes syndrome

• Short stature
• Ataxia
• Nystagmus
• Muscular hypotonia
• Optic atrophy

SOURCES: ORPHANET MENDELIAN

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

SOURCES: OMIM MENDELIAN

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

SOURCES: OMIM MENDELIAN

TELO2-RELATED INTELLECTUAL DISABILITY-NEURODEVELOPMENTAL DISORDER Is also known as you-hoover-fong syndrome

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

SOURCES: ORPHANET OMIM MENDELIAN

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

SOURCES: OMIM MENDELIAN

NDAGSCW is a neurodevelopmental disorder characterized by severely delayed psychomotor development apparent from infancy. Affected individuals have delayed and difficulty walking, intellectual disability, absent speech, and variable additional features, including hip dysplasia, tapering fingers, and seizures. Brain imaging shows decreased cortical white matter, often with decreased cerebellar white matter, thin corpus callosum, and thin brainstem (summary by Lamers et al., 2017).

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

SOURCES: OMIM MENDELIAN

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

SOURCES: OMIM MENDELIAN

Okur-Chung neurodevelopmental syndrome is an autosomal dominant disorder characterized by delayed psychomotor development, intellectual disability with poor speech, behavioral abnormalities, cortical malformations in some patients, and variable dysmorphic facial features. Additional features, including microcephaly, gastrointestinal problems, and low levels of immunoglobulins, may be observed in some patients (Okur et al., 2016).

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

SOURCES: OMIM MENDELIAN

SLC35A1-CDG is an extremely rare form of CDG syndrome (see this term) characterized clinically in the single reported case by repeated hemorrhagic incidents, including severe pulmonary hemorrhage.

SLC35A1-CDG Is also known as cdg iif|congenital disorder of glycosylation type iif|cmp-sialic acid transporter deficiency|congenital disorder of glycosylation type 2f|cdg-iif|carbohydrate deficient glycoprotein syndrome type iif|cdg2f|cdg syndrome type iif|cdgiif

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

SOURCES: OMIM MESH ORPHANET MENDELIAN

Intellectual disability-coarse face-macrocephaly-cerebellar hypotrophy syndrome is a rare, genetic, central nervous system malformation syndrome characterized by early-onset, progressive, severe cerebellar ataxia associated with progressive, moderate to severe intellecutal disability, global developmental delay, progressively coarsening facial features, relative macrocephaly and absence of seizures. Sensorineural hearing loss may be associated. Neuroimaging reveals cerebellar atrophy/hypoplasia.

INTELLECTUAL DISABILITY-COARSE FACE-MACROCEPHALY-CEREBELLAR HYPOTROPHY SYNDROME Is also known as intellectual disability-coarse face-macrocephaly-cerebellar hypoplasia syndrome|scar20|autosomal recessive spinocerebellar ataxia type 20

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

SOURCES: ORPHANET OMIM MENDELIAN