Autosomal recessive multiple epiphyseal dysplasia

Medical condition

Autosomal recessive multiple epiphyseal dysplasia

Autosomal recessive multiple epiphyseal dysplasia has an autosomal recessive pattern of inheritance.

Autosomal recessive multiple epiphyseal dysplasia (ARMED), also called epiphyseal dysplasia, multiple, 4 (EDM4), multiple epiphyseal dysplasia with clubfoot or –with bilayered patellae,[1] is an autosomal recessive[2] congenital disorder affecting cartilage and bone development. The disorder has relatively mild signs and symptoms, including joint pain, scoliosis, and malformations of the hands, feet, and knees.[3]

Some affected individuals are born with an inward- and downward-turning foot (a clubfoot). An abnormality of the kneecap called a double-layered patella is also relatively common. Although some people with recessive multiple epiphyseal dysplasia have short stature as adults, most are of normal height. The incidence is unknown as many cases are not diagnosed due to mild symptoms.

## Signs and symptoms

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## Cause

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Mutations in the SLC26A2 (DTDST) gene, located at human chromosome 5q32-33.1, are the cause of ARMED.[2][4] It is considered a milder disorder within a spectrum of skeletal disorders caused by mutations in the gene, which encodes a protein that is essential for the normal development of cartilage and its conversion to bone.[3] Mutations in the SLC26A2 gene alter the structure of developing cartilage, preventing bones from forming properly and resulting in associated skeletal maldevelopment.[3]

The disorder is inherited in an autosomal recessive manner.[2] This means the defective gene responsible for the disorder is located on an autosome (chromosome 5 is an autosome), and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disorder. The parents of an individual with an autosomal recessive disorder both carry one copy of the defective gene, but usually do not experience any signs or symptoms of the disorder.

## Diagnosis

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## Treatment

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## See also

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* Multiple epiphyseal dysplasia

## References

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1. ^ Online Mendelian Inheritance in Man (OMIM): 226900
2. ^ a b c Hinrichs, T.; Superti-Furga, A.; Scheiderer, W. -D.; Bonafé, L.; Brenner, R.; Mattes, T. (June 2010). "Recessive multiple epiphyseal dysplasia (rMED) with homozygosity for C653S mutation in the DTDST gene - phenotype, molecular diagnosis and surgical treatment of habitual dislocation of multilayered patella: case report". BMC Musculoskeletal Disorders (Free full text). 11: 110. doi:10.1186/1471-2474-11-110. PMC 2902411. PMID 20525296.
3. ^ a b c "Recessive multiple epiphyseal dysplasia at Genetics Home Reference". Retrieved July 22, 2010.
4. ^ Online Mendelian Inheritance in Man (OMIM): 606718

## External links

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Classification|

* OMIM: 226900
* MeSH: C535504
* DiseasesDB: 30716

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* Online Mendelian Inheritance in Man (OMIM): 226900
* Epiphyseal dysplasia, multiple, 4; Multiple epiphyseal dysplasia, autosomal recessive at NIH's Office of Rare Diseases
* Adam, M. P.; Feldman, J.; Mirzaa, G. M.; Pagon, R. A.; Wallace, S. E.; Bean LJH; Gripp, K. W.; Amemiya, A.; Unger, S.; Superti-Furga, A. (1993). "SLC26A2-Related Multiple Epiphyseal Dysplasia". Multiple Epiphyseal Dysplasia, Recessive. GeneReviews. University of Washington, Seattle. PMID 20301483 - via NCBI Bookshelf.

* v
* t
* e

Osteochondrodysplasias

Osteodysplasia/
osteodystrophy|

| Diaphysis|

* Camurati–Engelmann disease

|

Metaphysis|

* Metaphyseal dysplasia
* Jansen's metaphyseal chondrodysplasia
* Schmid metaphyseal chondrodysplasia

Epiphysis|

* Spondyloepiphyseal dysplasia congenita
* Multiple epiphyseal dysplasia
* Otospondylomegaepiphyseal dysplasia

Osteosclerosis|

* Raine syndrome
* Osteopoikilosis
* Osteopetrosis

Other/ungrouped|

* FLNB
* Boomerang dysplasia
* Opsismodysplasia
* Polyostotic fibrous dysplasia
* McCune–Albright syndrome

Chondrodysplasia/
chondrodystrophy
(including dwarfism)|

| Osteochondroma|

* osteochondromatosis
* Hereditary multiple exostoses

|

Chondroma/enchondroma|

* enchondromatosis
* Ollier disease
* Maffucci syndrome

Growth factor receptor|

| FGFR2:|

* Antley–Bixler syndrome

|

FGFR3:|

* Achondroplasia
* Hypochondroplasia
* Thanatophoric dysplasia

COL2A1 collagen disease|

* Achondrogenesis
* type 2
* Hypochondrogenesis

SLC26A2 sulfation defect|

* Achondrogenesis
* type 1B
* Autosomal recessive multiple epiphyseal dysplasia
* Atelosteogenesis, type II
* Diastrophic dysplasia

Chondrodysplasia punctata|

* Rhizomelic chondrodysplasia punctata
* Conradi–Hünermann syndrome

Other dwarfism|

* Fibrochondrogenesis
* Short rib – polydactyly syndrome
* Majewski's polydactyly syndrome
* Léri–Weill dyschondrosteosis

* v
* t
* e

Genetic disorder, membrane: Solute carrier disorders

1-10|

* SLC1A3
* Episodic ataxia 6
* SLC1A4
* SPATCCM
* SLC2A1
* De Vivo disease
* SLC2A2
* Fanconi-Bickel syndrome
* SLC2A5
* Fructose malabsorption
* SLC2A10
* Arterial tortuosity syndrome
* SLC3A1
* Cystinuria
* SLC4A1
* Hereditary spherocytosis 4/Hereditary elliptocytosis 4
* SLC4A11
* Congenital endothelial dystrophy type 2
* Fuchs' dystrophy 4
* SLC5A1
* Glucose-galactose malabsorption
* SLC5A2
* Renal glycosuria
* SLC5A5
* Thyroid dyshormonogenesis type 1
* SLC6A19
* Hartnup disease
* SLC7A7
* Lysinuric protein intolerance
* SLC7A9
* Cystinuria

11-20|

* SLC11A1
* Crohn's disease
* SLC12A3
* Gitelman syndrome
* SLC16A1
* HHF7
* SLC16A2
* Allan–Herndon–Dudley syndrome
* SLC17A3
* Von Gierke's disease, GSD-Ic
* SLC17A5
* Salla disease
* SLC17A8
* DFNA25

21-40|

* SLC26A2
* Multiple epiphyseal dysplasia 4
* Achondrogenesis type 1B
* Recessive multiple epiphyseal dysplasia
* Atelosteogenesis, type II
* Diastrophic dysplasia
* SLC26A4
* Pendred syndrome
* SLC35C1
* CDOG 2C
* SLC37A4
* Von Gierke's disease, GSD-Ib
* SLC39A4
* Acrodermatitis enteropathica
* SLC40A1
* African iron overload

51-60|

* SLC54A1 (Mitochondrial pyruvate carrier deficiency)

see also solute carrier family
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