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Types of Hearing Loss in Children What are the different types of hearing loss? There are 3 main types of hearing loss: sensorineural, conductive, and mixed (both sensorineural and conductive). These types of hearing loss can be present at birth (congenital). Or they can happen

Truncus Arteriosus (TA) What is truncus arteriosus? Truncus arteriosus is a heart defect that is present at birth (congenital). It happens when there is an abnormal connection between the aorta and pulmonary artery. Normally, the aorta and the pulmonary artery are separate. In

Brain Abscess in Children What is a brain abscess in children? An abscess is a pocket of infection. In the brain, an abscess may be in one or more areas. This condition may cause problems with how the brain and spinal cord function. It's a serious and life-threatening condition

Polycystic Kidney Disease What is polycystic kidney disease (PKD)? Polycystic kidney disease (PKD) is a rare genetic disorder. It causes many cysts filled with fluid to grow in the kidneys. PKD cysts can impair how the kidneys work. It can lead to kidney failure. PKD is the

Posterior Urethral Valves in Children What are posterior urethral valves in children? Posterior urethral valves are a problem with the urethra in a boy. The urethra is the tube that drains urine from the bladder to the outside of the body. Posterior urethral valves are small

Sexually Transmitted Infections in Teens What are sexually transmitted infections (STIs)? Sexually transmitted infections (STIs) are infectious diseases spread through sexual contact. About 50 out of 100 new STIs happen in people ages 15 to 24. Protecting your teen from STIs The

Psychological Complications of Chronic Illness Being a teen is stressful even for physically healthy teens. Chronic illness at this age can complicate development. The illness, treatment, and hospital stays all magnify concerns about how a teen looks. They also interfere with

Achondroplasia in Children What is achondroplasia in a child? Achondroplasia is the most common type of rare genetic bone disorder. The strong, flexible tissue called cartilage is not made into bone as normal. This causes a series of signs, such as short arms and legs and a large

Anatomy of the Endocrine System in Children These are parts of the endocrine system: Hypothalamus. This gland is in the brain. It secretes hormones that stimulate or suppress the release of hormones in the pituitary gland. It also controls water balance, sleep, temperature

Overview of Neck Masses in Children What are neck masses? Neck lumps (masses) are common problems in babies and children. Some neck masses are present at birth (congenital). They result from abnormal formation that occurs in the early stages of an unborn baby's development. Many