Ataxia, and Delayed puberty

Low match PERRAULT SYNDROME 3; PRLTS3

Perrault syndrome (PRLTS) is an autosomal recessive disorder characterized by sensorineural hearing loss (SNHL) and premature ovarian failure (POF) secondary to ovarian dysgenesis. Affected males have SNHL but show normal pubertal development. A spectrum of additional clinical features, including cerebellar ataxia, learning disability, and peripheral neuropathy, have been described in some affected individuals (summary by Jenkinson et al., 2013).For a discussion of genetic heterogeneity of Perrault syndrome, see PRLTS1 (OMIM ).

PERRAULT SYNDROME 3; PRLTS3 Is also known as dfnb81, formerly|deafness, autosomal recessive 81, formerly

• Seizures
• Global developmental delay
• Short stature
• Hearing impairment
• Microcephaly

SOURCES: OMIM MENDELIAN

Low match PROGRESSIVE AUTOSOMAL RECESSIVE ATAXIA-DEAFNESS SYNDROME

Lichtenstein-Knorr syndrome is an autosomal recessive neurologic disorder characterized by postnatal onset of severe progressive sensorineural hearing loss and progressive cerebellar ataxia. Features usually develop in childhood or young adulthood (summary by Guissart et al., 2015).

PROGRESSIVE AUTOSOMAL RECESSIVE ATAXIA-DEAFNESS SYNDROME Is also known as scar19|progressive autosomal recessive ataxia-sensorineural hearing loss syndrome|lichtenstein-knorr syndrome|spinocerebellar ataxia, autosomal recessive 19

• Seizures
• Short stature
• Hearing impairment
• Ataxia
• Nystagmus

SOURCES: OMIM ORPHANET MENDELIAN

Low match BOUCHER-NEUHAUSER SYNDROME; BNHS

Boucher-Neuhauser syndrome is an autosomal recessive disorder characterized classically by the triad of spinocerebellar ataxia, hypogonadotropic hypogonadism, and visual impairment due to chorioretinal dystrophy. The age at onset is variable, but most patients develop one or more symptoms in the first decade of life. Chorioretinal dystrophy may not always be present. BNHS is part of a spectrum of neurodegenerative diseases associated with mutations in the PNPLA6 gene that also includes spastic paraplegia-39 (SPG39 ) (summary by Synofzik et al., 2014).See also Gordon Holmes syndrome (GDHS ), caused by mutation in the RNF216 gene (OMIM ), which is also characterized by the combination of cerebellar ataxia and hypogonadotropic hypogonadism.

BOUCHER-NEUHAUSER SYNDROME; BNHS Is also known as spinocerebellar ataxia, hypogonadotropic hypogonadism, and chorioretinal dystrophy

• Ataxia
• Spasticity
• Cognitive impairment
• Visual impairment
• Dysarthria

SOURCES: OMIM MENDELIAN

Low match 46,XX GONADAL DYSGENESIS

46,XX gonadal dysgenesis (46,XX GD) is a primary ovarian defect leading to premature ovarian failure (POF; see this term) in otherwise normal 46,XX females as a result of failure of the gonads to develop or due to resistance to gonadotrophin stimulation.

46,XX GONADAL DYSGENESIS Is also known as xx female gonadal dysgenesis|46,xx pure gonadal dysgenesis|46,xx complete gonadal dysgenesis|follicular stimulating hormone-resistant ovaries|hypergonadotropic ovarian dysgenesis|xx-gd|46,xx ovarian dysgenesis|fsh-ro

• Short stature
• Hearing impairment
• Microcephaly
• Ataxia
• Abnormality of metabolism/homeostasis

SOURCES: ORPHANET MENDELIAN

Low match HYPOGONADOTROPIC HYPOGONADISM 1 WITH OR WITHOUT ANOSMIA; HH1

Congenital idiopathic hypogonadotropic hypogonadism (IHH) is a disorder characterized by absent or incomplete sexual maturation by the age of 18 years, in conjunction with low levels of circulating gonadotropins and testosterone and no other abnormalities of the hypothalamic-pituitary axis. Idiopathic hypogonadotropic hypogonadism can be caused by an isolated defect in gonadotropin-releasing hormone (GNRH ) release, action, or both. Other associated nonreproductive phenotypes, such as anosmia, cleft palate, and sensorineural hearing loss, occur with variable frequency. In the presence of anosmia, idiopathic hypogonadotropic hypogonadism has been called 'Kallmann syndrome (KS),' whereas in the presence of a normal sense of smell, it has been termed 'normosmic idiopathic hypogonadotropic hypogonadism (nIHH)' (summary by Raivio et al., 2007). Because families have been found to segregate both KS and nIHH, the disorder is here referred to as 'hypogonadotropic hypogonadism with or without anosmia.'For information on the autosomal forms of hypogonadotropic hypogonadism with or without anosmia, see {147950}.

HYPOGONADOTROPIC HYPOGONADISM 1 WITH OR WITHOUT ANOSMIA; HH1 Is also known as anosmic hypogonadism|hha|kallmann syndrome 1|dysplasia olfactogenitalis of de morsier|hypogonadotropic hypogonadism and anosmia|kms|kal1

• Hearing impairment
• Ataxia
• Sensorineural hearing impairment
• Cleft palate
• Cryptorchidism

SOURCES: ORPHANET OMIM MENDELIAN

Low match PEROXISOME BIOGENESIS DISORDER 6B; PBD6B

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. Some patients with PEX10 mutations have a milder disorder characterized by childhood-onset cerebellar ataxia and neuropathy without mental retardation (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 PEX10 gene have cells of complementation group 7 (CG7, equivalent to CGB). For information on the history of PBD complementation groups, see {214100}.

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

SOURCES: OMIM MENDELIAN

Low match TREMOR-ATAXIA-CENTRAL HYPOMYELINATION SYNDROME

TREMOR-ATAXIA-CENTRAL HYPOMYELINATION SYNDROME Is also known as tach syndrome

• Global developmental delay
• Short stature
• Ataxia
• Nystagmus
• Spasticity

SOURCES: ORPHANET MENDELIAN

Low match WOLFRAM-LIKE SYNDROME

Wolfram-like syndrome is a rare endocrine disease characterized by the triad of adult-onset diabetes mellitus, progressive hearing loss (usually presenting in the first decade of life and principally of low to moderate frequencies), and/or juvenile-onset optic atrophy. Psychiatric (i.e. anxiety, depression, hallucinations) and sleep disorders, the only neurologic abnormalities observed in this disease, have been reported in rare cases. Unlike Wolfram syndrome, patients with Wolfram-like syndrome do not report endocrine or cardiac findings.

WOLFRAM-LIKE SYNDROME Is also known as hearing loss, progressive, with optic atrophy and/or impaired glucose regulation

• Hearing impairment
• Ataxia
• Sensorineural hearing impairment
• Visual impairment
• Peripheral neuropathy

SOURCES: MESH OMIM ORPHANET MENDELIAN

Low match PERRAULT SYNDROME

Perrault syndrome (PS) is characterized by the association of ovarian dysgenesis in females with sensorineural hearing impairment. In more recent PS reports, some authors have described neurologic abnormalities, notably progressive cerebellar ataxia and intellectual deficit.

PERRAULT SYNDROME Is also known as ovarian dysgenesis with sensorineural deafness|gonadal dysgenesis, xx type, with deafness|xx gonodal dysgenesis-deafness syndrome

• Intellectual disability
• Short stature
• Hearing impairment
• Scoliosis
• Ataxia

SOURCES: ORPHANET OMIM MENDELIAN

Low match HYPOMYELINATING LEUKODYSTROPHY-ATAXIA-HYPODONTIA-HYPOMYELINATION SYNDROME

Hypomyelinating leukodystrophy-ataxia-hypodontia-hypomyelination syndrome is a rare, genetic, neurological disorder characterized by early-onset, progressive ataxia, white matter hypomyelination and cerebellar atrophy on brain MRI imaging, and various dental abnormalities, including hypodontia, delayed primary tooth eruption, complete retention of the primary maxillary central incisors and abnormal shape of the permanent maxillary incisors.

HYPOMYELINATING LEUKODYSTROPHY-ATAXIA-HYPODONTIA-HYPOMYELINATION SYNDROME Is also known as 4h syndrome|leukodystrophy, hypomyelinating, with hypodontia and hypogonadotropic hypogonadism|leukoencephalopathy, hypomyelinating, with ataxia and delayed dentition|ataxia, delayed dentition, and hypomyelination|ataxia-delayed dentition-hypomyelination

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

SOURCES: ORPHANET OMIM MENDELIAN