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Autosomal recessive limb-girdle muscular dystrophy type 2O(LGMD2O; MDDGC3; LGMDR15)

MedGen UID:
461767
Concept ID:
C3150417
Disease or Syndrome
Synonyms: Limb-Girdle Muscular Dystrophy Type 2O; Limb-Girdle Muscular Dystrophy Type 3C; Limb-girdle muscular dystrophy-dystroglycanopathy, type C3; MUSCULAR DYSTROPHY-DYSTROGLYCANOPATHY (LIMB-GIRDLE), TYPE C, 3; MUSCULAR DYSTROPHY-DYSTROGLYCANOPATHY, LIMB-GIRDLE, POMGNT1-RELATED
SNOMED CT: Autosomal recessive limb girdle muscular dystrophy type 2O (725043006); Limb-girdle muscular dystrophy 2O POMGNT1 (protein o-mannose beta-1,2-n-acetylglucosaminyltransferase) gene mutation (725043006); Limb-girdle muscular dystrophy 2O POMGNT1 gene mutation (725043006)
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
 
Gene (location): POMGNT1 (1p34.1)
 
Monarch Initiative: MONDO:0013161
OMIM®: 613157
Orphanet: ORPHA206564

Definition

MDDGC3 is a rare form of autosomal recessive limb-girdle muscular dystrophy with normal cognition (Clement et al., 2008). It is part of a group of similar disorders resulting from defective glycosylation of alpha-dystroglycan (DAG1; 128239), collectively known as 'dystroglycanopathies' (Godfrey et al., 2007). For a discussion of genetic heterogeneity of muscular dystrophy-dystroglycanopathy type C, see MDDGC1 (609308). [from OMIM]

Clinical features

From HPO
Fatigue
MedGen UID:
41971
Concept ID:
C0015672
Sign or Symptom
A subjective feeling of tiredness characterized by a lack of energy and motivation.
Motor delay
MedGen UID:
381392
Concept ID:
C1854301
Finding
A type of Developmental delay characterized by a delay in acquiring motor skills.
Hyperlordosis
MedGen UID:
9805
Concept ID:
C0024003
Finding
Abnormally increased curvature (anterior concavity) of the lumbar or cervical spine.
Muscular dystrophy
MedGen UID:
44527
Concept ID:
C0026850
Disease or Syndrome
The term dystrophy means abnormal growth. However, muscular dystrophy is used to describe primary myopathies with a genetic basis and a progressive course characterized by progressive skeletal muscle weakness and wasting, defects in muscle proteins, and histological features of muscle fiber degeneration (necrosis) and regeneration. If possible, it is preferred to use other HPO terms to describe the precise phenotypic abnormalities.
Proximal muscle weakness
MedGen UID:
113169
Concept ID:
C0221629
Finding
A lack of strength of the proximal muscles.
Gowers sign
MedGen UID:
65865
Concept ID:
C0234182
Finding
A phenomenon whereby patients are not able to stand up without the use of the hands owing to weakness of the proximal muscles of the lower limbs.
Difficulty climbing stairs
MedGen UID:
68676
Concept ID:
C0239067
Finding
Reduced ability to climb stairs.
Calf muscle hypertrophy
MedGen UID:
335868
Concept ID:
C1843057
Finding
Muscle hypertrophy affecting the calf muscles.
Increased variability in muscle fiber diameter
MedGen UID:
336019
Concept ID:
C1843700
Finding
An abnormally high degree of muscle fiber size variation. This phenotypic feature can be observed upon muscle biopsy.
Skeletal muscle hypertrophy
MedGen UID:
853739
Concept ID:
C2265792
Finding
Abnormal increase in muscle size and mass not due to training.
Increased endomysial connective tissue
MedGen UID:
867771
Concept ID:
C4022161
Finding
An increased volume of the endomysium, which is a connective tissue sheath that surrounds each muscule fiber. Together, bundles of muscle fibers form a fasciculus, surrounded by another layer of connective tissue called the perimysium.
Elevated circulating creatine kinase concentration
MedGen UID:
69128
Concept ID:
C0241005
Finding
An elevation of the level of the enzyme creatine kinase (also known as creatine phosphokinase (CK; EC 2.7.3.2) in the blood. CK levels can be elevated in a number of clinical disorders such as myocardial infarction, rhabdomyolysis, and muscular dystrophy.
High myopia
MedGen UID:
78759
Concept ID:
C0271183
Disease or Syndrome
A severe form of myopia with greater than -6.00 diopters.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVAutosomal recessive limb-girdle muscular dystrophy type 2O
Follow this link to review classifications for Autosomal recessive limb-girdle muscular dystrophy type 2O in Orphanet.

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