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Osgood–Schlatter disease
Osgood–Schlatter disease (OSD), also known as apophysitis of the tibial tubercle, or Lannelongue's disease,〔 is an inflammation of the patellar ligament at the tibial tuberosity. It is characterized by a painful lump just below the knee and is most often seen in young adolescents. Risk factors include overuse (especially in sports involving running, jumping and quick changes of direction) and adolescent growth spurts.
The condition is named after Robert Bayley Osgood (1873–1956), an American orthopedic surgeon and Carl B. Schlatter, (1864–1934), a Swiss surgeon who described the condition independently in 1903.
==Signs and symptoms==
Osgood–Schlatter disease causes pain in the front lower part of the knee. This is usually at the ligament-bone junction of the patellar ligament and the tibial tuberosity.〔Çakmak, S., Tekin, L., & Akarsu, S. (2014). Long-term outcome of Osgood-Schlatter disease: not always favorable. Rheumatology International, 34(1), 135–136.〕 The tibial tuberosity is a slight elevation of bone on the anterior and proximal portion of the tibia. The patellar tendon attaches the anterior quadriceps muscles to the tibia.〔
Intense knee pain is usually the presenting symptom that occurs during activities such as running, jumping, squatting, and especially ascending or descending stairs and during kneeling. The pain is worse with acute knee impact. The pain can be reproduced by extending the knee against resistance, stressing the quadriceps, or striking the knee. Pain is initially mild and intermittent. In the acute phase, the pain is severe and continuous in nature. Impact of the affected area can be very painful. Bilateral symptoms are observed in 20–30% of patients.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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