Osgood-Schlatter disease.

Osgood-Schlatter disease is a generally benign, self-limited knee condition most commonly found in rapidly growing and athletically active adolescents. Diagnosis is based on clinical and radiographic examination. Although the etiology of this disorder is controversial, chronic microtrauma to the tibial tuberosity secondary to overuse of the quadriceps muscle is suspected. Management strategies usually include analgesics and restrictions on physical activities involving the knee. Surgical treatment may be required in recurrent, disabling cases or for removal of a cosmetic deformity.