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Commonly Called: Osgood-Schlatter


A painful bump below the kneecap

Group commonly affected

  • Common in adolescents that participate in sports (1 in 5)
  • Boys age 13-14
  • Girls 11 to 12
  • More common in boys but the gender gap is closing
  • One of most common causes of knee pain in young athletes


  • Repetitive micro-trauma to the knee
  • Repeated running and jumping
  • Sports that require running and rapid direction changes
  • Trauma

Common Symptoms

  • Swelling
  • Leg pain
  • Knee pain (worse with activity)
  • Tightness of surrounding muscles, especially quadriceps
  • Tenderness of bony bump below kneecap

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