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Medical Genetics: Types of Genetic Changes The human body has about 20,000 different genes in each cell. Genes are located on chromosomes, which are stick-shaped structures in the middle of the cell (nucleus). Each cell usually has 46 chromosomes grouped in 23 pairs. Each gene

Herpes Simplex Virus (Cold Sores) in Children What are cold sores in children? Cold sores are small blisters around the mouth caused by the herpes simplex virus. They are sometimes called fever blisters. What causes cold sores in a child? The most common cause of cold sores is

Gastrointestinal Problems What might gastrointestinal problems mean in a newborn? A newborn's ability to eat and digest food is essential to growth and development. Most babies are able to absorb nutrients and have normal bowel movements after being fed. Gastrointestinal problems

Kyphosis in Children What is kyphosis in children? Kyphosis is a deformity of the backbone (spine). It’s when the bones of the spine (vertebrae) in the upper back curve outward more than they should. A child with kyphosis has a back that is abnormally rounded or humpback. The

Failure to Thrive (FTT) in Children What is failure to thrive in children? Failure to thrive (FTT) is slow physical development in a baby or child. It's caused by a baby or child not having enough nutrition. FTT is a clinical observation, not a diagnosis. It is used to describe a

Vision Problems in Children Vision problems that may affect your child Eye disorders that affect vision can be divided into refractive and non-refractive errors. Refractive errors. These eye disorders cause blurred vision. They occur because the shape of the eye does not focus

Medical Genetics: Getting Genetic Services for Your Child What are genetic services? Genetic services are programs that help support families and children with genetic disorders. Genetic services can: Give you information about your family’s genetic risk factors. Diagnose a

Bleeding Disorders Many different bleeding disorders require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. Hemophilia Idiopathic Thrombocytopenic Purpura© 2000-2026 The StayWell

Thalassemia Click on the links below to learn more about this topic. Alpha Thalassemia Beta Thalassemia (Cooley's Anemia)© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your

Substance Exposure Click on the links below to learn more about this topic. Neonatal Abstinence Syndrome Fetal Alcohol Syndrome (FAS)© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always