A number sign (#) is used with this entry because Dyggve-Melchior-Clausen disease (DMC) is caused by homozygous or compound heterozygous mutation in. Dyggve-Melchior-Clausen disease (DMC) is a rare skeletal disorder Differential diagnoses include Smith-McCort syndrome (SMC; see this term), which. Dyggve-Melchior-Clausen (DMC) syndrome is a rare autosomal recessive disorder characterized by the association of spondylo-epi-metaphyseal dysplasia and.
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The documents contained in this web site are presented for information purposes only. A diagnosis of DMC syndrome may be suspected upon a thorough clinical evaluation, a detailed patient history, and identification of characteristic clinical findings, e.
Check this box if you wish to receive dygyve-melchior-clausen copy of your message. The condition is inherited in an autosomal dominant mode.
Rare Disease Database
Please consider making a donation now and again in the future. Histologically, both DMC and SMS exhibit deficient chondrocytic organization and differentiation, and columnar formation that contain populations of degenerating cells with rough endoplasmic reticulum inclusions Horton and Scott ; Nakamura Secondary problems resulting from the skeletal abnormalities associated with DMC may include spinal compression, dislocated hips and restricted joint mobility.
Dictionary of Medical Syndromes. Dyghve-melchior-clausen gene is located on the long arm q of chromosome 18 18qq He emphasized prominence of the jaw and relative microcephaly. Mental retardation and abnormal skeletal development Dyggve-Melchior-Clausen dysplasia due to mutations in a novel, evolutionarily conserved gene.
Dyggve Melchior Clausen syndrome – NORD (National Organization for Rare Disorders)
The clinical features of Morquio syndrome type B are usually fewer and milder than those associated with Morquio syndrome type A. Dyggve-Melchior-Clausen disease DMC is a rare skeletal disorder belonging to the group of spondyloepimetaphyseal dysplasias see this term.
Heterogeneity of Dyggve-Melchior-Clausen dwarfism. With the exception of reduced length, affected individuals usually are normal at birth. Alone we are rare. Differential diagnosis Differential diagnoses include Smith-McCort syndrome SMC; see this termwhich presents with the same clinical and radiological features as DMC but without intellectual deficiency, and Morquio disease or mucopolysaccharidosis type 4, MPS IV; see this termwhich is clinically similar but has specific radiological and enzymatic signs.
Information on current clinical trials is posted on the Internet at www. Adult height is severely reduced with height ranging from 82 cm to cm 32 in to 50 in. Summary Epidemiology To date around cases have been recorded. The Dyggve-Melchior-Clausen syndrome in adult siblings.
Dyggve-Melchior-Clausen syndrome DMC is a rare, progressive genetic disorder characterized by abnormal skeletal development, microcephaly and intellectual disability.
Radiographically, there is severe and generalized platyspondyly, widened and irregular metaphyses of the tubular bones, coxa vara, and delayed bone maturation. Other features may include flat facies, myopia progressing to retinal detachment, kyphoscoliosis and platyspondyly. Neurologic and behavioral complications in DMC may include hyperactivity, autistic-like behavior, lack of speech and mild to severe intellectual disability with IQ scores ranging from 25 to 65 Paupe et al.
In someindividuals, ulnar deviation of the wrists abnormal bending of the hand toward the fifth finger side of the handand limited flexibility the elbows and hips may occur.
The carpal bones bones of the wrist may also be small and irregularly shaped. CCCCC ]. Additional clinical features that may also develop include dolichocephaly a long skullmicrocephaly a small headcoarse facial appearance, prognathism a protruding lower jaw.
Abnormal serum alphamacroglobulin in Dyggve-Melchior-Clausen syndrome. Often there are spinal abnormalities including lumbar lordosis and kyphosis. Affected individuals also have abnormalities affecting the eyes including myopia nearsightedness and, in approximately 50 percent of patients, retinal detachment. In South Africa, Winship and Rubin described an affected brother and sister whose parents were first cousins and whose ancestors migrated to South Africa from India in the 19th century.
Changes in the composition of this collagen lead to abnormal skeletal growth in this and related disorders.
Comparisons may be useful for a differential diagnosis: Diagnosis is based on radiological evidence revealing platyspondyly with double vertebral humps, epiphyseal and metaphyseal dysplasia and scalloped iliac crests.
Throughout childhood and as adults, thoracic kyphosis, scoliosis, lumbar lordosis, subluxation partial dislocation and frank dislocation of the hips, wide-based and waddling gait, genu valgum or varum, and restricted joint mobility appear and may worsen.
Pseudoachondroplasia is due to dyggve-melchior-clausfn of the cartilage oligomeric matrix protein COMP gene, and as such, is allelic to some cases of multiple epiphyseal dysplasia i. Diagnosis A diagnosis of DMC syndrome may be suspected upon a thorough clinical evaluation, a detailed patient history, and identification of characteristic clinical findings, e. In autosomal recessive dyggve-melchior-clauden, if an individual receives one normal gene and one gene for the disease, the person is a carrier for the disease, but usually will not have any clinical manifestations of the condition.
DMC appears to be produced mostly by premature truncation of the DYM product resulting in complete or nearly complete absence of dymeclin production from both DYM genes. In adult patients, the vertebral bodies become more rectangular as the appositional bone which appears during adolescence becomes fused.
Both are classified as osteochondrodysplasias, specifically a spondyloepimetaphyseal dysplasia; this latter category of dysplasias consists of 28 separate disorders Lachmanpp.
Skeletal findings often are recognized first between 1 and 18 months. For information about clinical trials conducted in Europe, contact: Kniest dysplasia is also caused by mutations in the COL2A1 gene. Health care resources for this disease Expert centres Diagnostic tests 11 Patient organisations 35 Orphan drug s 0. Spondyloepiphyseal dysplasia congenital is inherited as an autosomal dominant trait and is produced by a mutation in the collagen II COL2A1 gene.
Case report and review of the literature. CC ]. The data corroborated the impression that these 2 disorders are allelic and identified a gene necessary for normal skeletal development and brain function. Morphological findings in the growth plate of the iliac crest.
Eur J Pediatr ; A histological study of the growth plate. Years Published, ,