Ataxia, and Highly arched eyebrow

• Global developmental delay
• Generalized hypotonia
• Ataxia
• Abnormal facial shape
• Ptosis

SOURCES: OMIM MENDELIAN

SEVERE INTELLECTUAL DISABILITY-CORPUS CALLOSUM AGENESIS-FACIAL DYSMORPHISM-CEREBELLAR ATAXIA SYNDROME Is also known as birk-flusser syndrome

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

SOURCES: OMIM ORPHANET MENDELIAN

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

SOURCES: MESH 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

Joubert syndrome-14 is an autosomal recessive developmental disorder characterized by severe mental retardation, hypoplasia of the cerebellar vermis and molar tooth sign (MTS) on brain imaging, hypotonia, abnormal breathing pattern in infancy, and dysmorphic facial features. Additional findings can include renal cysts, abnormal eye movements, and postaxial polydactyly (summary by Boycott et al., 2007 and Huang et al., 2011).For a phenotypic description and a discussion of genetic heterogeneity of Joubert syndrome, see {213300}.

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

SOURCES: OMIM MENDELIAN

Joubert syndrome (JS) is characterized by congenital malformation of the brainstem and agenesis or hypoplasia of the cerebellar vermis leading to an abnormal respiratory pattern, nystagmus, hypotonia, ataxia, and delay in achieving motor milestones.

JOUBERT SYNDROME Is also known as cerebelloparenchymal disorder iv|joubert syndrome type a|classic joubert syndrome|pure joubert syndrome|cpd iv|joubert-boltshauser syndrome

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

SOURCES: ORPHANET MENDELIAN

6q terminal deletion syndrome is marked by a characteristic facial dysmorphism, short neck and psychomotor retardation, generally associated with a range of non-specific malformations.

• Seizures
• Global developmental delay
• Scoliosis
• Hypertelorism
• Nystagmus

SOURCES: ORPHANET MENDELIAN

Saguenay-Lac-St. Jean (SLSJ) type congenital lactic acidosis, a French Canadian form of Leigh syndrome (see this term), is a mitochondrial disease characterized by chronic metabolic acidosis, hypotonia, facial dysmorphism and delayed development.

CONGENITAL LACTIC ACIDOSIS, SAGUENAY-LAC-SAINT-JEAN TYPE Is also known as cytochrome oxidase deficiency, saguenay-lac-saint-jean type|cytochrome c oxidase deficiency, french canadian type|cytochrome c oxidase deficiency, french-canadian type|cox deficiency, french canadian type|leigh syndrome, french-canadian type|slsj-cox defi

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

SOURCES: OMIM MESH ORPHANET MENDELIAN

Joubert syndrome with renal defect is a rare subtype of Joubert syndrome and related disorders (JSRD, see this term) characterized by the neurological features of JS associated with renal disease, in the absence of retinopathy.

JOUBERT SYNDROME WITH RENAL DEFECT Is also known as js-r

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

SOURCES: OMIM MESH ORPHANET MENDELIAN

Joubert syndrome with ocular defect is, along with pure JS, the most frequent subtype of Joubert syndrome and related disorders (JSRD, see these terms) characterized by the neurological features of JS associated with retinal dystrophy.

JOUBERT SYNDROME WITH OCULAR DEFECT Is also known as joubert syndrome with retinopathy|js-o

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

SOURCES: ORPHANET MENDELIAN