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Autosomal recessive limb-girdle muscular dystrophy type 2K (LGMD2K) is a form of limb-girdle muscular dystrophy characterized by the onset of slowly progressive proximal muscle weakness during childhood (with fatigue and difficulty running and climbing stairs) and developmental delay. Mild intellectual deficit and microcephaly, without any obvious structural brain abnormality, are found in all patients. Mild pseudohypertrophy and joint contractures of the ankles have also been reported.
Features include always present findings: Elevated creatine kinase (muscle enzyme) (elevated circulating creatine kinase concentration), Delayed ability to walk, Difficulty climbing stairs, and Hypoglycosylation of alpha-dystroglycan and others; and very common findings: Enlarged calf muscles (calf muscle hypertrophy). 17 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Muscles | 5 | Flexion contracture, Difficulty climbing stairs, Progressive muscle deterioration (muscular dystrophy) |
Brain and nerves | 3 | Difficulty walking (gait disturbance), Spinal rigidity, Intellectual disability |
Bones and joints | 2 | Joint stiffness, Excessive inward curve of the lower back (lumbar hyperlordosis) |
Lab test results | 1 | Elevated creatine kinase (muscle enzyme) (elevated circulating creatine kinase concentration) |
Head and neck | 1 | Microcephaly |
Heart and blood vessels | 1 | Heart muscle disease (cardiomyopathy) |
Arms and legs | 1 | Limb-girdle muscle weakness |
POMT1 function has not been fully characterized.
Autosomal recessive limb-girdle muscular dystrophy type 2K is associated with mutations in the POMT1 gene on chromosome 9.
Genetic testing for POMT1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 6 always present features, 1 very common feature, 1 common feature.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
2 clinical trials registered, 2 recruiting. Interventions under study include other interventions. Research is primarily sponsored by academic and government institutions.
118 publications have been identified in PubMed for autosomal recessive limb-girdle muscular dystrophy type 2K. Kisho has analyzed 44 by research type. Research spans Review / Meta-Analysis (43%), Case Report / Case Series (18%), and Epidemiology / Natural History (18%).
Research Type | Count | % of Total |
|---|---|---|
Research summaries | 19 | 43% |
Patient case studies | 8 | 18% |
Disease patterns and progression | 8 | 18% |
Clinical study results | 6 | 14% |
Laboratory research | 2 | 5% |
Other research | 1 | 2% |
Schroeder RL (2026). [PMID: 41064951](https://pubmed.ncbi.nlm.nih.gov/41064951/). *Vet Pathol*. [Basic Science / Preclinical]
Zhang J (2026). [PMID: 42158226](https://pubmed.ncbi.nlm.nih.gov/42158226/). *Clin Case Rep*. [Case Report / Case Series]
Li S (2026). [PMID: 41379706](https://pubmed.ncbi.nlm.nih.gov/41379706/). *J Fam Psychol*. [Review / Meta-Analysis]
Jayanna S (2026). [PMID: 41930014](https://pubmed.ncbi.nlm.nih.gov/41930014/). *Oman J Ophthalmol*. [Case Report / Case Series]
Woodward LJ (2025). [PMID: 39491338](https://pubmed.ncbi.nlm.nih.gov/39491338/). *Acta Paediatr*. [Review / Meta-Analysis]
Sawangkum P (2025). [PMID: 41399054](https://pubmed.ncbi.nlm.nih.gov/41399054/). *J Clin Ultrasound*. [Case Report / Case Series]
Campbell JI (2025). [PMID: 39509188](https://pubmed.ncbi.nlm.nih.gov/39509188/). *Curr Opin Pediatr*. [Review / Meta-Analysis]
Liu FQ (2025). [PMID: 40186435](https://pubmed.ncbi.nlm.nih.gov/40186435/). *J Ultrasound Med*. [Clinical Trial Publication]
Flynn P (2025). [PMID: 40578827](https://pubmed.ncbi.nlm.nih.gov/40578827/). *Sleep*. [Review / Meta-Analysis]
Ishigaki K (2025). [PMID: 40011677](https://pubmed.ncbi.nlm.nih.gov/40011677/). *Sci Rep*. [Epidemiology / Natural History]
Data assembled from 7 of 12 sources · Last updated Sep 20, 2026, 10:55 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center