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Limb-girdle muscular dystrophy due to POMK deficiency(MDDGC12)

MedGen UID:
863621
Concept ID:
C4015184
Disease or Syndrome
Synonyms: Muscular dystrophy-dystroglycanopathy (limb-girdle), type c, 12; MUSCULAR DYSTROPHY-DYSTROGLYCANOPATHY, LIMB-GIRDLE, POMK-RELATED
SNOMED CT: Limb girdle muscular dystrophy due to protein O-mannose kinase deficiency (1234819007); Limb girdle muscular dystrophy due to POMK deficiency (1234819007)
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): POMK (8p11.21)
 
Monarch Initiative: MONDO:0014489
OMIM®: 616094
Orphanet: ORPHA445110

Definition

A form of limb-girdle muscular dystrophy presenting in infancy with muscle weakness and delayed motor development (eventually learning to walk at 18 months of age) followed by progressive proximal weakness, pseudohypertrophy of calf muscles, mild facial weakness and borderline intelligence. [from SNOMEDCT_US]

Clinical features

From HPO
Limb-girdle muscle weakness
MedGen UID:
347625
Concept ID:
C1858127
Finding
Weakness of the limb-girdle muscles (also known as the pelvic and shoulder girdles), that is, lack of strength of the muscles around the shoulders and the pelvis.
Intellectual disability, borderline
MedGen UID:
507499
Concept ID:
C0006009
Finding
Borderline intellectual disability is defined as an intelligence quotient (IQ) in the range of 70-85.
Delayed ability to walk
MedGen UID:
66034
Concept ID:
C0241726
Finding
A failure to achieve the ability to walk at an appropriate developmental stage. Most children learn to walk in a series of stages, and learn to walk short distances independently between 12 and 15 months.
Hyporeflexia
MedGen UID:
195967
Concept ID:
C0700078
Finding
Reduction of neurologic reflexes such as the knee-jerk reaction.
Motor delay
MedGen UID:
381392
Concept ID:
C1854301
Finding
A type of Developmental delay characterized by a delay in acquiring motor skills.
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.
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.
Enlarged cisterna magna
MedGen UID:
344031
Concept ID:
C1853377
Finding
Increase in size of the cisterna magna, one of three principal openings in the subarachnoid space between the arachnoid and pia mater, located between the cerebellum and the dorsal surface of the medulla oblongata.
Neonatal hypotonia
MedGen UID:
412209
Concept ID:
C2267233
Disease or Syndrome
Muscular hypotonia (abnormally low muscle tone) manifesting in the neonatal period.
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.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVLimb-girdle muscular dystrophy due to POMK deficiency

Recent clinical studies

Etiology

Ardicli D, Gocmen R, Talim B, Sprute R, Haliloglu G, Cirak S, Topaloglu H
Neuromuscul Disord 2017 Mar;27(3):239-242. Epub 2016 Dec 23 doi: 10.1016/j.nmd.2016.12.008. PMID: 28109637

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