At what age should a lateral neck radiograph be done for a child with Downs syndrome to rule out atlanto-occipital subluxation?
Children with Down syndrome have an increased risk of atlanto-occipital subluxation, a condition where the bones of the upper neck are misaligned. This instability can potentially lead to serious neurological complications if not identified.
To screen for this potential instability, a lateral neck radiograph is recommended. Current medical guidelines and practices often suggest performing this initial screening at a specific age to assess for significant bony abnormalities or instability before a child becomes significantly more mobile.
Based on common clinical recommendations for screening atlanto-occipital subluxation in children with Down syndrome, the lateral neck radiograph is often performed around the age of 3 years. This timing allows for assessment before increased physical activity associated with toddlerhood.
Consider the following statements regarding non-invasive prenatal screening (NIPS) for screening high risk pregnancies for aneuploidies:
1. It is carried out on maternal blood.
2. It is done before 10 weeks gestation.
3. It has a negative predictive value of about 98%.
4. Invasive testing is needed for confirmation of a positive test.
Which of the statements given above are correct?
Which of the following are examples of genomic imprinting?
1. Angelman syndrome
2. Williams syndrome
3. Prader-Willi syndrome
4. DiGeorge syndrome
Select the correct answer using the code given below: