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Kniest Dysplasia is a rare, inherited skeletal disorder characterized by severe short stature, spinal curvature (scoliosis or kyphosis), and enlarged, stiff joints. It is a form of osteochondrodysplasia.
read more about kniest dysplasia ...The cause is a mutation in the COL2A1 gene, which is necessary for producing Type II collagen. This collagen is essential for the formation of cartilage, which is a major component of bone structure and joints. The defective collagen causes abnormal bone growth, resulting in short limbs and severe enlargement of the joints. The disorder is typically inherited in an autosomal dominant pattern.
Characteristic features include severe short stature and a short trunk. Patients often have a rounded face, a flattened nose, and hearing loss. The most severe problem is enlarged joints that are stiff and restrict movement, often leading to arthritis and chronic joint pain.
Kniest Dysplasia directly impacts vision. Patients are at high risk of developing severe myopia (nearsightedness) and retinal detachment due to abnormalities in the vitreous gel, which can liquefy and pull on the retina. Surgery may be needed to repair the detachment. Glaucoma is also a possible complication.
Diagnosis is usually made at birth or in early childhood. Imaging (X-rays) confirms the abnormal bone and joint structures. Genetic testing is used to confirm the mutation in the COL2A1 gene.
Necessary treatment strategies involve managing joint and bone issues. Orthopedic procedures may be needed to correct spinal deformities. Physical therapy is essential to maintain muscle strength and joint mobility. Regular eye exams are needed to monitor for retinal detachment.
No, it is a permanent genetic disorder, but symptoms are managed with orthopedic and physical therapy.
No, the disorder does not typically affect lifespan, but it significantly affects mobility and quality of life.
Yes, orthopedic surgery is often needed to stabilize the spine and manage joint issues.
Consult a pediatric ophthalmologist immediately for a child with Kniest Dysplasia. This condition is characterized by severe "Malignant Myopia" and a very high risk of "Retinal Detachment" due to collagen defects. Lifelong monitoring of the retina is a medical necessity to prevent blindness.
NORD. Kniest Dysplasia (rarediseases.org). 2024.
AAO. Ocular Manifestations of Skeletal Dysplasias (aao.org). 2024.
Mayo Clinic. Skeletal Dysplasia Overview (mayoclinic.org). 2024.
StatPearls. Kniest Dysplasia (ncbi.nlm.nih.gov). 2024.