Acrodysostosis
(Redirected from Maroteaux-Malamut syndrome)
Acrodysostosis | |
---|---|
Synonyms | Arkless-Graham syndrome, Maroteaux-Malamut syndrome |
Pronounce | N/A |
Specialty | N/A |
Symptoms | Short stature, brachydactyly, facial dysostosis, intellectual disability |
Complications | N/A |
Onset | Congenital |
Duration | Lifelong |
Types | N/A |
Causes | Genetic mutation |
Risks | Family history |
Diagnosis | Clinical evaluation, genetic testing |
Differential diagnosis | Pseudohypoparathyroidism, Albright's hereditary osteodystrophy |
Prevention | N/A |
Treatment | Symptomatic treatment, physical therapy, occupational therapy |
Medication | N/A |
Prognosis | N/A |
Frequency | Rare |
Deaths | N/A |
A rare genetic disorder affecting bone growth
Acrodysostosis is a rare genetic disorder characterized by skeletal dysplasia, which affects bone growth and development. This condition is typically evident at birth or in early childhood and is marked by distinctive facial features, short stature, and abnormalities in the hands and feet.
Signs and Symptoms
Individuals with acrodysostosis often present with a variety of physical characteristics and developmental challenges. Common features include:
- Facial Features: A prominent forehead, a flat nasal bridge, and a small upturned nose are typical facial characteristics. The ears may be low-set, and the mouth may appear small.
- Skeletal Abnormalities: Shortened bones in the hands and feet, known as brachydactyly, are common. The fingers and toes may be stubby, and there may be limited joint mobility.
- Short Stature: Affected individuals often have a shorter than average height due to the abnormal development of bones.
- Developmental Delays: Some individuals may experience delays in reaching developmental milestones, and there may be intellectual disability in some cases.
- Hearing Loss: Conductive hearing loss can occur due to structural abnormalities in the ear.
Genetics
Acrodysostosis is primarily caused by mutations in the PRKAR1A or PDE4D genes. These genes are involved in the regulation of cyclic AMP (cAMP) signaling pathways, which play a crucial role in bone growth and development. The condition is inherited in an autosomal dominant pattern, meaning a single copy of the altered gene in each cell is sufficient to cause the disorder.
Diagnosis
Diagnosis of acrodysostosis is based on clinical evaluation, characteristic physical findings, and radiographic imaging that reveals the skeletal abnormalities. Genetic testing can confirm the diagnosis by identifying mutations in the PRKAR1A or PDE4D genes.
Management
There is no cure for acrodysostosis, and treatment focuses on managing symptoms and improving quality of life. This may include:
- Orthopedic Interventions: Surgery may be necessary to correct severe skeletal deformities or to improve joint function.
- Hearing Aids: For those with hearing loss, hearing aids or other assistive devices can be beneficial.
- Developmental Support: Early intervention programs, including physical therapy, occupational therapy, and special education services, can help address developmental delays and learning difficulties.
Prognosis
The prognosis for individuals with acrodysostosis varies depending on the severity of symptoms and the presence of associated conditions. With appropriate management and support, many individuals can lead fulfilling lives.
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Contributors: Deepika vegiraju, Prab R. Tumpati, MD