kidshealth library

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Bones & Muscles

  • Polydactyly

    Polydactyly is when a baby is born with an extra finger on the hand or an extra toe on the foot. It can be on one or both hands or feet.

  • Pompe Disease

    Pompe disease is a rare genetic condition that makes muscles get weaker over time.

  • Postural Kyphosis

    Postural kyphosis is rounding or hunching of the back that usually affects teens. It’s due to “bad” posture and not disease.

  • Primordial Dwarfism

    People with primordial dwarfism have slowed growth that begins before birth and continues throughout life. Sometimes they have other health problems too.

  • Pseudoachondroplasia

    Pseudoachondroplasia is a skeletal dysplasia that causes dwarfism and arms and legs that are short compared with the body. Children who have it can live long and productive lives.

  • Radial Dysplasia

    Babies with radial dysplasia (also called radial club hand) are born with a short or missing radial bone. This makes the wrist turn in.

  • Repetitive Stress Injuries in Sports

    Repetitive stress injuries (RSIs) happen when movements are repeated over and over, damaging a bone, tendon, or joint.

  • Rickets

    Rickets is when bones become soft and weak, usually because a child doesn’t get enough vitamin D. Most kids with rickets get better with treatment.

  • Rigo Cheneau Brace

    A Rigo Cheneau brace is a type of spine brace for scoliosis. Used with physical therapy, it can improve a child’s posture.

  • Rotator Cuff Tendonitis

    Rotator cuff tendonitis is inflammation of the tendons of the rotator cuff, a group of muscles and tendons in the shoulder bones.