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Testicular Torsion in Children What is testicular torsion in children? Testicular torsion is a painful twisting of the testicles and spermatic cord. The spermatic cord is a set of nerves, ducts, and blood vessels that leads from the groin to the testicles. Torsion can happen to 1

Germ Cell Tumors (GCTs) in Children What are germ cell tumors in children? A type of cell that forms as a fetus (also called unborn baby or embryo) develops is called a germ cell. Germ cells are the cells that make the eggs (ova) in females and the sperm in males. Germ cell

Ureterocele and Ureteral Duplication in Children What is a ureterocele and ureteral duplication in children? A ureterocele is a problem with a ureter. The ureter is a tube that connects the kidney to the bladder. There is 1 ureter for each kidney. The ureters send urine from the

Hepatoblastoma in Children What is hepatoblastoma in children? Hepatoblastoma is a very rare cancer that starts in the liver. It usually affects children less than 3 years of age. About half of all children with it are diagnosed before age 1. It usually doesn’t spread

Neuroblastoma What is neuroblastoma in children? Neuroblastoma is cancer that starts when immature nerve cells in the nervous system grow out of control. These cells are called neuroblasts. Over time, the out-of-control cells form a tumor. Neuroblastoma is the most common solid

Severe Combined Immunodeficiency (SCID) in Children What is SCID in children? SCID is a very rare disease that can be deadly. It causes a child to have a very weak immune system. As a result, the child is unable to fight off even mild infections. The disease is also known as the

High Blood Pressure in Children and Teens What is high blood pressure in children? Blood pressure is the force of the blood pushing against the artery walls. Two numbers are recorded when measuring blood pressure: Systolic pressure. This is the higher number. It refers to the

Hepatitis in Children What is hepatitis in children? Hepatitis is an inflammation of the liver. It can damage and destroy liver cells. What causes hepatitis in a child? Hepatitis in children can be caused by many things. Your child can get hepatitis by being exposed to a virus

About the Heart and Blood Vessels The heart is the hardest working muscle in the human body. Located almost in the center of the chest, a healthy adult heart is the size of a clenched adult fist. By age 70, the human heart will beat more than 2.5 billion times. The heart is

Arrhythmias in Children What are arrhythmias in children? An arrhythmia is an abnormal heart rhythm. When a child has an arrhythmia, abnormal electrical signals sent through the heart muscle may cause the heart to beat too fast (tachycardia), too slow (bradycardia), or in an