Learn the most common Down syndrome symptoms and risk factors, including medical conditions, physical traits and possible behavioral characteristics. Severity of these generally varies in each child depending on which different type the child may have.
Many researchers believe that there are typically fewer symptoms in individuals with the types mosaicism and translocation, than those with the type non-disjunction. This is because non-disjunction is the only one that involves a third chromosome 21 found in all the cells of the body <span style='font-size: 50%'>(1).
The three different types of Down syndrome are<span style='font-size: 50%'>(2):
1. Non-disjunction (also known as Trisomy 21)
• Mild to moderate cognitive disability
• Metabolic Imbalances
• Almost half of children are born with a heart defect that can be progressive and lead to heart surgery
• Low Muscle Tone
• Risks of obesity
• Depressed immune system, leading to a higher incidence of infection, respiratory problems, and frequent cold and flu viruses<span style='font-size: 50%'>(2).
• Risks of gastrointestinal complications, including esophageal atresia.
• Risks of leukemia and other cancers
• Seizure disorders
• Other conditions, such as celiac disease, epilepsy, hypothyroidism, sleep apnea, vision and hearing impairments, gastrointestinal problems, skin problems and eye conditions.
1. Web MD. Down Syndrome. www.webmed.com. 3-6-10.
2. Cauldwell, K. (2006). Down Syndrome Information: Characteristics of Down Syndrome. www.associatedcontent.com. 10-11-10.
3. Web MD. Down Syndrome Symptoms. www.webmd.com. 3-6-10.