Ataxia, and Single transverse palmar crease

Medium match PEROXISOME BIOGENESIS DISORDER 4B; PBD4B

Peroxisome biogenesis disorder-4B (PDB4B) includes the overlapping phenotypes of neonatal adrenoleukodystrophy (NALD) and infantile Refsum disease (IRD), which represent milder manifestations of the Zellweger syndrome spectrum (ZSS) of peroxisome biogenesis disorders (PBDs). The clinical course of patients with the NALD and IRD presentation is variable and may include developmental delay, hypotonia, liver dysfunction, sensorineural hearing loss, retinal dystrophy, and visual impairment. Children with the NALD presentation may reach their teens, and those with the IRD presentation may reach adulthood (summary by Waterham and Ebberink, 2012).For a complete phenotypic description and a discussion of genetic heterogeneity of PBD(NALD/IRD), see {601539}.Individuals with mutations in the PEX6 gene have cells of complementation group 4 (CG4, equivalent to CG6 and CGC). For information on the history of PBD complementation groups, see {214100}.

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

SOURCES: OMIM MENDELIAN

Medium match LAURENCE-MOON SYNDROME

Laurence-Moon syndrome (LMS) is a very rare genetic multisystemic disorder characterized by pituitary dysfunction, ataxia, peripheral neuropathy, spastic paraplegia, and chorioretinal dystrophy.

• Intellectual disability
• Short stature
• Ataxia
• Nystagmus
• Strabismus

SOURCES: ORPHANET MENDELIAN

Medium match NEURODEVELOPMENTAL DISORDER WITH ATAXIC GAIT, ABSENT SPEECH, AND DECREASED CORTICAL WHITE MATTER; NDAGSCW

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

Medium match PEROXISOME BIOGENESIS DISORDER 3B; PBD3B

The overlapping phenotypes of neonatal adrenoleukodystrophy (NALD) and infantile Refsum disease (IRD) represent the milder manifestations of the Zellweger syndrome spectrum (ZSS) of peroxisome biogenesis disorders. The clinical course of patients with the NALD and IRD presentation is variable and may include developmental delay, hypotonia, liver dysfunction, sensorineural hearing loss, retinal dystrophy, and visual impairment. Children with the NALD presentation may reach their teens, and those with the IRD presentation may reach adulthood (summary by Waterham and Ebberink, 2012).For a complete phenotypic description and a discussion of genetic heterogeneity of PBD(NALD/IRD), see {601539}.Individuals with mutations in the PEX12 gene have cells of complementation group 3 (CG3). For information on the history of PBD complementation groups, see {214100}.

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

SOURCES: OMIM MENDELIAN

Medium match CONGENITAL BILE ACID SYNTHESIS DEFECT TYPE 4

Congenital bile acid synthesis defect type 4 (BAS defect type 4) is an anomaly of bile acid synthesis (see this term) characterized by mild cholestatic liver disease, fat malabsorption and/or neurological disease.

CONGENITAL BILE ACID SYNTHESIS DEFECT TYPE 4 Is also known as 2-methylacyl-coa racemase deficiency|amacr deficiency|basd4|alpha-methyl-acyl-coa racemase deficiency|liver disease-retinitis pigmentosa-polyneuropathy-epilepsy syndrome

• Seizures
• Global developmental delay
• Ataxia
• Cataract
• Spasticity

SOURCES: OMIM ORPHANET MENDELIAN

Medium match X-LINKED INTELLECTUAL DISABILITY, CANTAGREL TYPE

X-linked Mental retardation Cantagrel type is characterised by marked neonatal hypotonia, progressive quadriparesia, severely delayed developmental milestones (walking at 3 years of age), gastroesophageal reflux, stereotypic movements of the hands, esotropia and infantile autism.

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

SOURCES: OMIM ORPHANET MENDELIAN

Medium match ALLAN-HERNDON-DUDLEY SYNDROME

Allan-Herndon-Dudley syndrome (AHDS) is an X-linked intellectual disability syndrome with neuromuscular involvement characterized by infantile hypotonia, muscular hypoplasia, spastic paraparesis with dystonic/athetoic movements, and severe cognitive deficiency.

ALLAN-HERNDON-DUDLEY SYNDROME Is also known as x-linked intellectual disability-hypotonia syndrome|t3 resistance|allan-herndon syndrome|triiodothyronine resistance|monocarboxylate transporter 8 deficiency|mct8 deficiency|mental retardation and muscular atrophy|mental retardation, x-linked, with hypoto

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

SOURCES: MESH ORPHANET OMIM MENDELIAN

Medium match MENTAL RETARDATION, X-LINKED, SYNDROMIC, 35; MRXS35

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

SOURCES: OMIM MENDELIAN

Medium match 3Q29 MICRODELETION SYNDROME

3q29 microdeletion syndrome is a recurrent subtelomeric deletion syndrome with variable clinical manifestations including intellectual deficit and dysmorphic features.

3Q29 MICRODELETION SYNDROME Is also known as del(3)(q29)|microdeletion 3q29 syndrome|3q subtelomere deletion syndrome|monosomy 3q29|monosomy 3qter|3qter deletion

• Intellectual disability
• Global developmental delay
• Microcephaly
• Ataxia
• Failure to thrive

SOURCES: OMIM MESH ORPHANET MENDELIAN

Medium match GLYCOSYLPHOSPHATIDYLINOSITOL BIOSYNTHESIS DEFECT 18; GPIBD18

GPIBD18 is a severe autosomal recessive developmental disorder characterized by severely impaired global development, hypotonia, weakness, ataxia, coarse facial features, and intractable seizures. More variable features may include abnormalities of the hands and feet, inguinal hernia, and feeding difficulties. The disorder is part of a group of similar neurologic disorders resulting from biochemical defects in the glycosylphosphatidylinositol (GPI) biosynthetic pathway (summary by Nguyen et al., 2018).For a discussion of genetic heterogeneity of GPI biosynthesis defects, see GPIBD1 (OMIM ).

• Seizures
• Global developmental delay
• Generalized hypotonia
• Hearing impairment
• Ataxia

SOURCES: OMIM MENDELIAN