Mitochondrial complex II deficiency, nuclear type 1
- Synonyms
- Complex 2 mitochondrial respiratory chain deficiency; Mitochondrial Respiratory Chain Complex II Deficiency; Mitochondrial Respiratory Chain Complex II Deficiency, SDHA-Related; Mitochondrial Respiratory Chain Complex II Deficiency, SDHAF1-Related; Mitochondrial complex II deficiency; Succinate CoQ reductase deficiency
- Modes of inheritance
- Autosomal recessive inheritance (Orphanet)
Summary
Available tests
Check Related conditions for additional relevant tests.
Clinical features
Help- Abnormal cellular phenotype
- Decreased activity of mitochondrial complex II
Decreased activity of mitochondrial complex II
- MedGen UID: 892305
- Concept ID: C4024705
- Finding: Finding
Abnormal cellular phenotype
- Decreased activity of mitochondrial complex II
- Abnormality of metabolism/homeostasis
- Elevated lactate:pyruvate ratio
Elevated lactate:pyruvate ratio
- MedGen UID: 1717835
- Concept ID: C5397670
- Finding: Finding
Abnormality of metabolism/homeostasis
- Increased circulating lactate concentration
Increased circulating lactate concentration
- MedGen UID: 332209
- Concept ID: C1836440
- Finding: Finding
Abnormality of metabolism/homeostasis
- Increased intramyocellular lipid droplets
Increased intramyocellular lipid droplets
- MedGen UID: 866481
- Concept ID: C4020730
- Finding: Finding
Abnormality of metabolism/homeostasis
- Stress/infection-induced lactic acidosis
Stress/infection-induced lactic acidosis
- MedGen UID: 870820
- Concept ID: C4025278
- Finding: Disease or Syndrome
Abnormality of metabolism/homeostasis
- Elevated lactate:pyruvate ratio
- Abnormality of the cardiovascular system
- Hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy
- MedGen UID: 2881
- Concept ID: C0007194
- Finding: Disease or Syndrome
Abnormality of the cardiovascular system
- Left ventricular noncompaction
Left ventricular noncompaction
- MedGen UID: 450531
- Concept ID: C1960469
- Finding: Disease or Syndrome
Abnormality of the cardiovascular system
- Primary dilated cardiomyopathy
Primary dilated cardiomyopathy
- MedGen UID: 2880
- Concept ID: C0007193
- Finding: Disease or Syndrome
Abnormality of the cardiovascular system
- Hypertrophic cardiomyopathy
- Abnormality of the eye
- Nystagmus
Nystagmus
- MedGen UID: 45166
- Concept ID: C0028738
- Finding: Disease or Syndrome
Abnormality of the eye
- Ophthalmoplegia
Ophthalmoplegia
- MedGen UID: 45205
- Concept ID: C0029089
- Finding: Sign or Symptom
Abnormality of the eye
- Optic atrophy
Optic atrophy
- MedGen UID: 18180
- Concept ID: C0029124
- Finding: Disease or Syndrome
Abnormality of the eye
- Pigmentary retinopathy
Pigmentary retinopathy
- MedGen UID: 1643295
- Concept ID: C4551715
- Finding: Disease or Syndrome
Abnormality of the eye
- Ptosis
Ptosis
- MedGen UID: 2287
- Concept ID: C0005745
- Finding: Disease or Syndrome
Abnormality of the eye
- Visual impairment
Visual impairment
- MedGen UID: 777085
- Concept ID: C3665347
- Finding: Finding
Abnormality of the eye
- Nystagmus
- Abnormality of the musculoskeletal system
- Abnormal mitochondria in muscle tissue
Abnormal mitochondria in muscle tissue
- MedGen UID: 867188
- Concept ID: C4021546
- Finding: Anatomical Abnormality
Abnormality of the musculoskeletal system
- Flexion contracture
Flexion contracture
- MedGen UID: 83069
- Concept ID: C0333068
- Finding: Anatomical Abnormality
Abnormality of the musculoskeletal system
- Muscle weakness
Muscle weakness
- MedGen UID: 57735
- Concept ID: C0151786
- Finding: Finding
Abnormality of the musculoskeletal system
- Neonatal hypotonia
Neonatal hypotonia
- MedGen UID: 412209
- Concept ID: C2267233
- Finding: Disease or Syndrome
Abnormality of the musculoskeletal system
- Ragged-red muscle fibers
Ragged-red muscle fibers
- MedGen UID: 477048
- Concept ID: C3275417
- Finding: Finding
Abnormality of the musculoskeletal system
- Abnormal mitochondria in muscle tissue
- Abnormality of the nervous system
- Babinski sign
Babinski sign
- MedGen UID: 19708
- Concept ID: C0034935
- Finding: Finding
Abnormality of the nervous system
- Cerebellar ataxia
Cerebellar ataxia
- MedGen UID: 849
- Concept ID: C0007758
- Finding: Disease or Syndrome
Abnormality of the nervous system
- Cognitive impairment
Cognitive impairment
- MedGen UID: 90932
- Concept ID: C0338656
- Finding: Mental or Behavioral Dysfunction
Abnormality of the nervous system
- Developmental regression
Developmental regression
- MedGen UID: 324613
- Concept ID: C1836830
- Finding: Disease or Syndrome
Abnormality of the nervous system
- Dystonic disorder
Dystonic disorder
- MedGen UID: 3940
- Concept ID: C0013421
- Finding: Sign or Symptom
Abnormality of the nervous system
- Global developmental delay
Global developmental delay
- MedGen UID: 107838
- Concept ID: C0557874
- Finding: Finding
Abnormality of the nervous system
- Hyperreflexia
Hyperreflexia
- MedGen UID: 57738
- Concept ID: C0151889
- Finding: Finding
Abnormality of the nervous system
- Leukoencephalopathy
Leukoencephalopathy
- MedGen UID: 78722
- Concept ID: C0270612
- Finding: Disease or Syndrome
Abnormality of the nervous system
- Myoclonus
Myoclonus
- MedGen UID: 10234
- Concept ID: C0027066
- Finding: Finding
Abnormality of the nervous system
- Progressive leukoencephalopathy
Progressive leukoencephalopathy
- MedGen UID: 344402
- Concept ID: C1855010
- Finding: Finding
Abnormality of the nervous system
- Seizure
Seizure
- MedGen UID: 20693
- Concept ID: C0036572
- Finding: Sign or Symptom
Abnormality of the nervous system
- Spasticity
Spasticity
- MedGen UID: 7753
- Concept ID: C0026838
- Finding: Sign or Symptom
Abnormality of the nervous system
- Truncal ataxia
Truncal ataxia
- MedGen UID: 96535
- Concept ID: C0427190
- Finding: Sign or Symptom
Abnormality of the nervous system
- Babinski sign
- Constitutional symptom
- Exercise intolerance
Exercise intolerance
- MedGen UID: 603270
- Concept ID: C0424551
- Finding: Finding
Constitutional symptom
- Exercise intolerance
- Growth abnormality
- Short stature
Short stature
- MedGen UID: 87607
- Concept ID: C0349588
- Finding: Finding
Growth abnormality
- Short stature
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