Schimke syndrome
(Redirected from Spondyloepiphyseal dysplasia nephrotic syndrome)
Schimke immuno-osseous dysplasia | |
---|---|
Synonyms | Schimke syndrome |
Pronounce | N/A |
Specialty | N/A |
Symptoms | Dwarfism, nephropathy, immune deficiency, cerebrovascular disease |
Complications | Stroke, renal failure, infections |
Onset | Childhood |
Duration | Lifelong |
Types | N/A |
Causes | Mutations in the SMARCAL1 gene |
Risks | Consanguinity |
Diagnosis | Genetic testing, clinical evaluation |
Differential diagnosis | Spondyloepiphyseal dysplasia, nephronophthisis, ataxia-telangiectasia |
Prevention | N/A |
Treatment | Supportive care, kidney transplant, immunoglobulin therapy |
Medication | N/A |
Prognosis | Variable, often poor |
Frequency | Rare |
Deaths | N/A |
Schimke Immuno-Osseous Dysplasia (SIOD), commonly referred to as Schimke syndrome, is a rare, autosomal recessive genetic disorder characterized by spondyloepiphyseal dysplasia, renal disease, and T-cell immunodeficiency. It is named after American pediatrician Maroteaux Lamy, who first described the condition in 1971. This disorder significantly impacts multiple body systems, leading to a wide range of health issues.
Symptoms and Characteristics
Schimke syndrome presents a variety of symptoms, primarily affecting the skeletal system, kidney function, and the immune system. Key characteristics include:
- Growth Retardation: Individuals with Schimke syndrome typically exhibit short stature due to spondyloepiphyseal dysplasia, a form of dwarfism affecting the spine and the ends of bones.
- Renal Disease: Progressive renal disease is a common and severe manifestation of Schimke syndrome, often leading to renal failure.
- Immunodeficiency: The condition is associated with T-cell immunodeficiency, making patients more susceptible to infections.
- Facial Features: Patients may have distinctive facial features, including a broad nasal bridge and a high forehead.
- Hyperpigmented Macules: Some individuals develop hyperpigmented skin macules.
Causes and Genetics
Schimke syndrome is caused by mutations in the SMARCAL1 gene, which plays a crucial role in DNA repair and maintenance. The disorder is inherited in an autosomal recessive pattern, meaning that an individual must inherit two copies of the mutated gene, one from each parent, to be affected.
Diagnosis
Diagnosis of Schimke syndrome is based on clinical evaluation and the presence of characteristic symptoms. Genetic testing can confirm the diagnosis by identifying mutations in the SMARCAL1 gene.
Treatment
There is no cure for Schimke syndrome, and treatment focuses on managing symptoms and preventing complications. Therapeutic strategies may include:
- Growth Hormone Therapy: To address short stature, although its effectiveness varies.
- Renal Transplant: For patients with end-stage renal disease.
- Immunosuppressive Therapy: To manage immunodeficiency and reduce the risk of infections.
Prognosis
The prognosis for individuals with Schimke syndrome varies, with life expectancy often reduced due to complications from renal failure and infections. Early diagnosis and comprehensive management of symptoms can improve quality of life.
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