Deficiency of guanidinoacetate methyltransferase
- Synonyms
- CEREBRAL CREATINE DEFICIENCY SYNDROME 2; Guanidinoacetate Methyltransferase Deficiency
- Modes of inheritance
- Autosomal recessive inheritance (Orphanet)
Summary
Excerpted from the GeneReview:- Full text of GeneReview (by section):
- Summary
- GeneReview Scope
- Diagnosis
- Clinical Characteristics
- Genetically Related (Allelic) Disorders
- Differential Diagnosis
- Management
- Genetic Counseling
- Resources
- Molecular Genetics
- Chapter Notes
- References
- Authors:
- Saadet Mercimek-Andrews
- Gajja S Salomons
- view full author information
Available tests
Check Related conditions for additional relevant tests.
Clinical tests (91 available)
Biochemical Genetics Tests
Clinical features
Help- Abnormality of metabolism/homeostasis
- Decreased serum creatinine
Decreased serum creatinine
- MedGen UID: 488901
- Concept ID: C0428282
- Finding: Finding
Abnormality of metabolism/homeostasis
- Elevated circulating guanidinoacetic acid concentration
Elevated circulating guanidinoacetic acid concentration
- MedGen UID: 1815073
- Concept ID: C5706167
- Finding: Finding
Abnormality of metabolism/homeostasis
- Decreased serum creatinine
- Abnormality of the digestive system
- Episodic vomiting
Episodic vomiting
- MedGen UID: 333228
- Concept ID: C1838993
- Finding: Finding
Abnormality of the digestive system
- Episodic vomiting
- Abnormality of the musculoskeletal system
- Hypertonia
Hypertonia
- MedGen UID: 10132
- Concept ID: C0026826
- Finding: Finding
Abnormality of the musculoskeletal system
- Hypotonia
Hypotonia
- MedGen UID: 10133
- Concept ID: C0026827
- Finding: Finding
Abnormality of the musculoskeletal system
- Infantile muscular hypotonia
Infantile muscular hypotonia
- MedGen UID: 395993
- Concept ID: C1860834
- Finding: Finding
Abnormality of the musculoskeletal system
- Rigidity
Rigidity
- MedGen UID: 7752
- Concept ID: C0026837
- Finding: Sign or Symptom
Abnormality of the musculoskeletal system
- Hypertonia
- Abnormality of the nervous system
- Absent speech
Absent speech
- MedGen UID: 340737
- Concept ID: C1854882
- Finding: Finding
Abnormality of the nervous system
- Aggressive behavior
Aggressive behavior
- MedGen UID: 1375
- Concept ID: C0001807
- Finding: Individual Behavior
Abnormality of the nervous system
- Atonic seizure
Atonic seizure
- MedGen UID: 78735
- Concept ID: C0270846
- Finding: Disease or Syndrome
Abnormality of the nervous system
- Bilateral tonic-clonic seizure
Bilateral tonic-clonic seizure
- MedGen UID: 141670
- Concept ID: C0494475
- Finding: Sign or Symptom
Abnormality of the nervous system
- Cerebellar ataxia
Cerebellar ataxia
- MedGen UID: 849
- Concept ID: C0007758
- Finding: Disease or Syndrome
Abnormality of the nervous system
- Delayed speech and language development
Delayed speech and language development
- MedGen UID: 105318
- Concept ID: C0454644
- Finding: Finding
Abnormality of the nervous system
- Developmental regression
Developmental regression
- MedGen UID: 324613
- Concept ID: C1836830
- Finding: Disease or Syndrome
Abnormality of the nervous system
- Elevated brain guanidinoacetate level by MRS
Elevated brain guanidinoacetate level by MRS
- MedGen UID: 1053602
- Concept ID: CN377315
- Finding: Finding
Abnormality of the nervous system
- Febrile seizure (within the age range of 3 months to 6 years)
Febrile seizure (within the age range of 3 months to 6 years)
- MedGen UID: 3232
- Concept ID: C0009952
- Finding: Disease or Syndrome
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
- Intellectual disability
Intellectual disability
- MedGen UID: 811461
- Concept ID: C3714756
- Finding: Mental or Behavioral Dysfunction
Abnormality of the nervous system
- Intellectual disability, severe
Intellectual disability, severe
- MedGen UID: 48638
- Concept ID: C0036857
- Finding: Mental or Behavioral Dysfunction
Abnormality of the nervous system
- Lower limb spasticity
Lower limb spasticity
- MedGen UID: 220865
- Concept ID: C1271100
- Finding: Finding
Abnormality of the nervous system
- Myoclonus
Myoclonus
- MedGen UID: 10234
- Concept ID: C0027066
- Finding: Finding
Abnormality of the nervous system
- Paraparesis
Paraparesis
- MedGen UID: 113150
- Concept ID: C0221166
- Finding: Sign or Symptom
Abnormality of the nervous system
- Progressive extrapyramidal movement disorder
Progressive extrapyramidal movement disorder
- MedGen UID: 411258
- Concept ID: C2748610
- Finding: Finding
Abnormality of the nervous system
- Reduced brain creatine level by MRS
Reduced brain creatine level by MRS
- MedGen UID: 1369880
- Concept ID: C4476570
- Finding: Finding
Abnormality of the nervous system
- Seizure
Seizure
- MedGen UID: 20693
- Concept ID: C0036572
- Finding: Sign or Symptom
Abnormality of the nervous system
- Severe global developmental delay
Severe global developmental delay
- MedGen UID: 332436
- Concept ID: C1837397
- Finding: Finding
Abnormality of the nervous system
- Tremor
Tremor
- MedGen UID: 21635
- Concept ID: C0040822
- Finding: Sign or Symptom
Abnormality of the nervous system
- Absent speech
- ACMG ACT, 2022American College of Medical Genetics and Genomics, Newborn Screening ACT Sheet, Increased Guanidinoacetate, Guanidinoacetate Methyltransferase Deficiency, 2022
- ACMG Algorithm, 2022American College of Medical Genetics and Genomics Algorithm, GAMT Deficiency: Elevated Guanidinoacetate, 2022
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