Ataxia, and Proximal muscle weakness

Low match NONAKA MYOPATHY; NM

NONAKA MYOPATHY; NM Is also known as myopathy, distal, with or without rimmed vacuoles|gne myopathy|inclusion body myopathy 2, autosomal recessive, formerly|ibm2, formerly|hibm|nonaka distal myopathy|inclusion body myopathy, quadriceps-sparing|qsm|inclusion body myopathy, hereditary, autosom

• Ataxia
• Muscle weakness
• Gait disturbance
• Myopathy
• Elevated serum creatine phosphokinase

SOURCES: OMIM MENDELIAN

Low match CHARCOT-MARIE-TOOTH DISEASE, DOMINANT INTERMEDIATE G; CMTDIG

CMTDIG is an autosomal dominant neurologic disorder with a highly variable phenotype. Most affected individuals have onset in the first or second decades of slowly progressive distal motor weakness and atrophy, resulting in gait instability and distal upper limb impairment, as well as distal sensory impairment. More severely affected individuals may have pes cavus and claw hands and become wheelchair-bound, whereas other affected individuals have later onset with a milder disease course. Electrophysiologic studies tend to show median motor nerve conduction velocities (NCV) in the 'intermediate' range, between 25 and 45 m/s (summary by Berciano et al., 2017).In a review of intermediate CMT, Berciano et al. (2017) noted that advanced axonal degeneration may induce secondary demyelinating changes resulting in decreased NCV and attenuated compound muscle action potential (CMAP) in median nerve conduction studies. They thus suggested that testing the upper arm, axilla to elbow, may provide more accurate assessment of NCV and CMAP and reveal an intermediate phenotype (review by Berciano et al., 2017).For a discussion of genetic heterogeneity of CMTDI, see {606482}.

• Generalized hypotonia
• Hearing impairment
• Ataxia
• Nystagmus
• Muscle weakness

SOURCES: OMIM MENDELIAN

Low match FRONTOTEMPORAL DEMENTIA AND/OR AMYOTROPHIC LATERAL SCLEROSIS 2; FTDALS2

• Hearing impairment
• Ataxia
• Sensorineural hearing impairment
• Muscle weakness
• Ptosis

SOURCES: OMIM MENDELIAN

Low match OPTIC ATROPHY 1; OPA1

Autosomal dominant optic atrophy is characterized by an insidious onset of visual impairment in early childhood with moderate to severe loss of visual acuity, temporal optic disc pallor, color vision deficits, and centrocecal scotoma of variable density (Votruba et al., 1998).Some patients with mutations in the OPA1 gene may also develop extraocular neurologic features, such as deafness, progressive external ophthalmoplegia, muscle cramps, hyperreflexia, and ataxia; see {125250}. There appears to be a wide range of intermediate phenotypes (Yu-Wai-Man et al., 2010).Yu-Wai-Man et al. (2009) provided a detailed review of autosomal dominant optic atrophy and Leber hereditary optic neuropathy (LHON ), with emphasis on the selective vulnerability of retinal ganglion cells to mitochondrial dysfunction in both disorders. Genetic Heterogeneity of Optic AtrophyOptic atrophy-2 (OPA2 ) maps to chromosome Xp11.4-p11.21. OPA3 (OMIM ) is caused by mutation in the OPA3 gene (OMIM ) on chromosome 19q13. OPA4 (OMIM ) maps to chromosome 18q12.2-q12.3. OPA5 (OMIM ) is caused by mutation in the DNM1L gene (OMIM ) on chromosome 12p11. OPA6 (OMIM ) maps to chromosome 8q21-q22. OPA7 (OMIM ) is caused by mutation in the TMEM126A gene (OMIM ) on chromosome 11q14. OPA8 (OMIM ) maps to chromosome 16q21-q22. OPA9 (OMIM ) is caused by mutation in the ACO2 gene (OMIM ) on chromosome 22q13; OPA10 (OMIM ) is caused by mutation in the RTN4IP1 gene (OMIM ) on chromosome 6q21; and OPA11 (OMIM ) is caused by mutation in the YME1L1 gene (OMIM ) on chromosome 10p12.

OPTIC ATROPHY 1; OPA1 Is also known as kjer-type optic atrophy|optic atrophy, kjer type|oak|optic atrophy, juvenile

• Hearing impairment
• Ataxia
• Strabismus
• Sensorineural hearing impairment
• Visual impairment

SOURCES: ORPHANET OMIM MENDELIAN

Low match AUTOSOMAL RECESSIVE ATAXIA DUE TO UBIQUINONE DEFICIENCY

This syndrome is characterised by childhood-onset progressive ataxia and cerebellar atrophy.

AUTOSOMAL RECESSIVE ATAXIA DUE TO UBIQUINONE DEFICIENCY Is also known as arca2|autosomal recessive cerebellar ataxia type 2|spinocerebellar ataxia, autosomal recessive 9|scar9|autosomal recessive ataxia due to coenzyme q10 deficiency|autosomal recessive spinocerebellar ataxia type 9

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

SOURCES: MESH OMIM ORPHANET MENDELIAN

Low match MITOCHONDRIAL MYOPATHY-LACTIC ACIDOSIS-DEAFNESS SYNDROME

Mitochondrial myopathy-lactic acidosis-deafness is a type of metabolic myopathy described only in two sisters to date, presenting during childhood, and characterized clinically by growth failure, severe muscle weakness, and moderate sensorineural deafness and biochemically by metabolic acidosis, elevated serum pyruvate concentration, hyperalaninemia and hyperalaninuria. There have been no further descriptions in the literature since 1973.

MITOCHONDRIAL MYOPATHY-LACTIC ACIDOSIS-DEAFNESS SYNDROME Is also known as mitochondrial myopathy-lactic acidosis-hearing loss syndrome

• Seizures
• Generalized hypotonia
• Sensorineural hearing impairment
• Muscle weakness
• Spasticity

SOURCES: OMIM ORPHANET MENDELIAN

Low match INTELLECTUAL DISABILITY-HYPERKINETIC MOVEMENT-TRUNCAL ATAXIA SYNDROME

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

SOURCES: ORPHANET MENDELIAN

Low match PROXIMAL MYOPATHY WITH EXTRAPYRAMIDAL SIGNS

Proximal myopathy with extrapyramidal signs is a rare, hereditary non-dystrophic myopathy characterized by proximal muscle weakness, delayed motor development, learning difficulties, and progressive extrapyramidal motor signs including chorea, dystonia and tremor. Variable additional features have been reported - ataxia, microcephaly, ophthalmoplegia, ptosis, and optic atrophy.

• Global developmental delay
• Hearing impairment
• Microcephaly
• Ataxia
• Muscle weakness

SOURCES: ORPHANET OMIM MENDELIAN

Low match MUSCULAR DYSTROPHY, SELCEN TYPE

Selcen type muscular dystrophy is characterized by progressive limb and axial muscle weakness associated with cardiomyopathy and severe respiratory insufficiency during adolescence. The disease manifests during childhood and progresses rapidly.

• Scoliosis
• Muscle weakness
• Flexion contracture
• Peripheral neuropathy
• Abnormality of the skeletal system

SOURCES: MESH OMIM ORPHANET MENDELIAN

Low match FRONTOTEMPORAL DEMENTIA WITH MOTOR NEURON DISEASE

Frontotemporal dementia with motor neuron disease (FTD-MND) is a type of frontotemporal lobar degeneration characterized by the insidious onset (between the ages of 38-78 years) of dementia-associated psychiatric symptoms (e.g. personality changes, uninhibited behavior, irritability, aggressiveness), memory difficulties, global intellectual impairment, emotional disorders and transcortical motor aphasia that eventually leads to mutism, in addition to the manifestations of motor neuron disease such as neurogenic muscular wasting (similar to what is seen in amyotrophic lateral sclerosis; see this term). The disease is progressive, with death occurring 2-5 years after onset.

FRONTOTEMPORAL DEMENTIA WITH MOTOR NEURON DISEASE Is also known as frontotemporal dementia and/or amyotrophic lateral sclerosis|frontotemporal dementia with amyotrophic lateral sclerosis|ftd-mnd|ftdmnd|ftd-als|amyotrophic lateral sclerosis and/or frontotemporal dementia|alsftd|frontotemporal dementia and/or motor neuron

• Ataxia
• Muscle weakness
• Ptosis
• Cognitive impairment
• Dysarthria

SOURCES: OMIM ORPHANET MENDELIAN