Osgood-Schlatter Disease (OSD)
Osgood-Schlatter disease can present as a painful lump below the kneecap in children and adolescents experiencing growth spurts during puberty and occurs most often in children who participate in sports that involve running, jumping and swift changes of direction — such as soccer, basketball, figure skating and ballet.
While Osgood-Schlatter disease is more common in boys.
Age ranges differ by sex because girls experience puberty earlier than do boys. Osgood-Schlatter disease typically occurs in boys ages 13 to 14 and girls ages 11 to 12. The condition usually resolves on its own, once the child's bones stop growing.
Symptoms and when to see a doctor ?
The pain associated with Osgood-Schlatter disease varies from person to person. Some have only mild pain while performing certain activities, especially running and jumping. For others, the pain is nearly constant and debilitating.
Osgood-Schlatter disease usually occurs in one knee, but both knees can be involved. The discomfort can last from weeks to months and may recur until your child has stopped growing.
Call your child's doctor if knee pain interferes with your child's ability to perform routine daily activities. Seek medical attention if the knee is also swollen and red, or if the knee pain is associated with fever, locking or instability of the knee joint.