Medically reviewed by: Judith L. Ross, MDThis link will open in a new window Learn About Endocrinology (Hormones & Growth) at Nemours Children's HealthThis link will open in a new window XYY syndrome ...

Medically reviewed by: Yamini Durani, MDThis link will open in a new window Learn About Primary Care Pediatrics at Nemours Children's HealthThis link will open in a new window ...

Medically reviewed by: Larissa Hirsch, MDThis link will open in a new window Learn About Adolescent Medicine & Pediatric Gynecology at Nemours Children's HealthThis link will open in a new window ...

Sickle cell disease is a group of conditions in which red blood cells are not shaped as they should be. Red blood cells normally look like round discs. But in sickle cell disease, they're shaped like ...

What Is Lactate Dehydrogenase (LDH)? The enzyme LDH, also called lactic acid dehydrogenase, is in almost all body tissues. It helps the body turn glucose (sugar) from food into usable energy for our ...

Medically reviewed by: Loren Berman, MDThis link will open in a new window Learn About Primary Care Pediatrics at Nemours Children's HealthThis link will open in a new window Appendicitis ...

Polio vaccines protect against polio, an infection caused by a virus that can lead to permanent paralysis (being unable to move) and sometimes death. Polio used to be common, but thanks to polio ...

Medically reviewed by: Sarah Logan, MDThis link will open in a new window Learn About Ophthalmology (Eye Care) at Nemours Children's HealthThis link will open in a new window As health problems go, a ...

Medically reviewed by: Larissa Hirsch, MDThis link will open in a new window Learn About Primary Care Pediatrics at Nemours Children's HealthThis link will open in a new window Respiratory syncytial ...

Medically reviewed by: Ryan J. Brogan, DOThis link will open in a new window Learn About Primary Care Pediatrics at Nemours Children's HealthThis link will open in a new window Toxic synovitis has a ...

Las vacunas enseñan al cuerpo a reconocer y a combatir los gérmenes. Cuando a alguien le ponen una vacuna contra una enfermedad, su cuerpo fabrica anticuerpos protectores contra la enfermedad. Esos ...

Medically reviewed by: Leah J. Orchinik, PhDThis link will open in a new window Learn About Behavioral Health (Psychology and Psychiatry) at Nemours Children's HealthThis link will open in a new ...