Three Cases of Spondyloepiphyseal Dysplasia Tarda in One Korean Family

Spondyloepiphyseal dysplasia (SED) tarda is an inherited skeletal arthropathy. Because SED tarda involves the joints and resemble the clinical findings of chronic arthropathies, this disease is frequently misdiagnosed as juvenile idiopathic arthritis (JIA). We report here on three patients (father and his two daughters) in one family with SED tarda. All patients had back pain and polyarthralgia. Their radiographs revealed typical changes for SED tarda including platyspondyly and dysplastic bone changes. This rare disease has major clinical importance in that it is similar with JIA or rheumatoid arthritis.

Hearing Loss in Patients with Spondyloepiphyseal Dysplasia Congenita and Tarda.

Aim: To describe hearing loss in patients with spondyloepiphyseal dysplasia congenita and tarda. Methodology: A literature review of the National Library of Medicine's online database on hearing loss in patients with spondyloepiphyseal dysplasia congenita and tarda was performed. Results: Four articles were identified that reported hearing loss in subjects with spondyloepiphyseal dysplasia congenita and tarda. Including this study, a total of fourteen patients with hearing loss are reported. Eight patients with sensorineural loss and two patients with mixed hearing loss were identified. The type of hearing loss is unknown in 4 cases. Conclusion: Serial audiograms are recommended early in life in individuals with spondyloepiphyseal dysplasia congenita and when clinically indicated in patients with spondyloepiphyseal dysplasia tarda.

A Case with Spondyloepiphyseal Dysplasia Tarda with TRAPPC2 Mutation

Spondyloepiphyseal dysplasia tarda (SEDT) is an X-linked skeletal dysplasia. Patients show disproportionate short stature with short trunk and barrel-shaped chest, which usually become pronounced in late childhood. The radiologic findings are characterized by narrow intervertebral disc spaces and moderate epiphyseal dysplasia of long bones. Here we report a case of SEDT with a novel frameshift mutation in TRAPPC2, the disease-causing gene of SEDT. This is the first Korean report with SEDT confirmed by genetic testing.

X-Linked Spondyloepiphyseal Dysplasia Tarda: Identification of a TRAPPC2 Mutation in a Korean Pedigree

Spondyloepiphyseal dysplasia (SED) comprises a heterogeneous group of skeletal dysplasias that primarily affect the epiphyses and vertebral bodies. Patients affected by SED usually exhibit short stature and experience early development of degenerative osteoarthritis. SED is subdivided into congenita and tarda forms according to the age at onset and clinical severity, and further subdivided into genetically different forms according to the mode of inheritance and the gene involved. We report a 14-yr-old Korean male who presented with a disproportionately short stature and a short trunk. A pedigree analysis of 3 generations with 6 affected persons revealed an X-linked recessive mode of inheritance. Mutation analysis of the TRAPPC2 (previously called SEDL) gene, the only gene associated with X-linked spondyloepiphyseal dysplasia tarda (X-linked SEDT; MIM 313400), was performed, and a splice-donor site mutation in intron 3 of the TRAPPC2 gene (c.93+5G>A) was identified in the proband and in his unaffected mother (a heterozygote). This mutation is one of the 2 most frequent mutations reported in the medical literature, and is known to result in exon 3 skipping. This is the first report of a genetically confirmed X-linked SEDT case in Korea and highlights the importance of recognizing the mode of inheritance in the diagnosis of X-linked SEDT.

A Case of Spondyloepiphyseal Dysplasia Tarda (SEDT) Misdiagnosed as Ankylosing Spondylitis

The spondyloepiphyseal dysplasia tarda (SEDT) is a hereditary arthropathy that progressively leads to deformities of small and large joints, irregularities of the end plates of vertebral bodies, which causes joint restriction, short stature, and gait difficulties. The typical radiographic findings of SEDT are generalized platyspondyly and dysplasia of the epiphyses, resulting in premature arthrosis. Clinically SEDT is manifested as a form of short-trunk dwarfism and early arthrosis in the period from late childhood to adolescence. The major clinical importance of this rare disease is similarity to juvenile idiopathic arthritis (JIA), which has a rather different prognosis and treatment. A few cases of SEDT have been published. However, no cases have been reported in South Korea. We describe the case of a 29-year old man who suffered from back and multiple joint pain, who was misdiagnosed as having ankylosing spondylitis. We evaluated the patient clinically and radiographically in greater detail, and changed his diagnosis to SED tarda.

Relationship between Spondyloppiphyseal Dysplasia Tarda Gene Escaping X Chromosome Inactivation and Spondyloppiphyseal Dysplasia Tarda Phenotype / 实用儿科临床杂志

Objective To explore the relationship between X - linked spondyloepiphyseal dysplasia tarda (SEDL) gene escaping X chromosome inactivation( XCI) and SEDL phenotype. Methods RT - PCR was performed on total RNA which was isolated from blood samples of patients, female carriers and controls. Patients and female carriers were selected from the pedigree with SEDL caused by the mutation (IVS2 - 2A→C) of the gene. cDNA was analyzed by polyacrylamide gelelectrophoresis(PAGE). Results PAGE data indicateed that female carriers expressed both normal and mutant SEDL mRNA,meaning the SEDL gene escaping XCI. Family investigation showed carrier females in the SEDL pedigree presented no symptoms. Conclusions The SEDL gene escaping X chromosome in-activation is firstly identified from human body. This may explain that carrier females present no symptoms.