DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Osgood-Schlatter's disease. Knee of a 14-year-old boy with a bony prominence (upper centre, tibial tuberosity) due to Osgood-Schlatter's disease. It is caused by repetitive pulling of the quadriceps (thigh muscle), occurring most commonly in teenage boys, it results due to excessive physical exertion. The condition usually resolves following up to six months of rest and when bone formation (ossification) is complete. However, if pain is particularly severe the knee may be immobilised in a plaster cast for up to six weeks.
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