In a normal hip joint, the top (head) of the thighbone (femur) fits snugly into the hip socket. In a child with DDH, the hip socket is shallow. As a result, the head of the femur may slip in and out.

A congenital limb difference is when an arm or leg doesn't form normally as a baby grows in the uterus. The baby is born with the difference.

Detailed information on the most common congenital and hereditary disorders in children

Detailed information on bone cancer in children, including Ewing sarcoma and osteogenic sarcoma

Wilms tumor is a cancerous tumor that starts in the cells of the kidney. It’s the most common type of kidney cancer in children.

A brain tumor is an abnormal growth of tissue in the brain. The brain is part of the central nervous system (CNS). The CNS also includes the spinal cord.

Detailed information on cancer in children

Rhabdomyosarcoma is a type of cancer. It starts in cells that should grow into skeletal muscle cells. Skeletal muscles control voluntary muscle movements. These are movements we can control. This rare cancer is most common in children under age 10.

Retinoblastoma is a rare cancer of the retina of the eye. The retina is in the back of the eye. It’s the part of the eye that receives light. Retinoblastoma is the most common tumor affecting the eye in children. It almost always occurs in children less than 5 years old.

Parents are entitled to a clear explanation about anything related to their child's condition. Here are some important questions you may consider asking your child's healthcare provider.