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Everything You Need to Know About Down Syndrome: Overview, Signs and Symptoms, Causes, Diagnosis, and Treatment


When people talk about chromosomal disorders, Down syndrome is one of the most common examples they refer to. It is actually the best known and most widely studied chromosomal ailment. It is also the top cause of cognitive problems and intellectual disability. Additionally, it is associated with a series of systemic issues and complications outside of the nervous system.

Overview

Every cell in the body has DNA stored in its nucleus (not red blood cells, though, because they do not have a nucleus). Genes are grouped in chromosomes every time the cell divides. Our cells have 23 pairs of chromosomes (46 chromosomes total), and every parent provides half of that genetic material. In Down syndrome, patients do not have only 46 chromosomes. They have 47 because chromosome 21 has an extra unit.

Each chromosome has thousands of genes, and each one encodes a new protein. Having one extra chromosome means having thousands of additional substances. In most cases, fetuses cannot survive this surplus, but Down syndrome is different. The disease is not fatal, but it is associated with several body and brain development changes.

Signs and symptoms

Signs and Symptoms of down syndrome

Patients with Down syndrome are relatively easy to diagnose. They have a set of signs and symptoms that stand out, even in people who do not have any medical knowledge.


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