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Prepatellar bursitis
Prepatellar bursitis (also known as beat knee,〔 carpet layer's knee, coal miner's knee, housemaid's knee,〔 rug cutter's knee, or nun's knee) 〔http://www.icd9data.com/2012/Volume1/710-739/725-729/727/727.2.htm〕 is an inflammation of the prepatellar bursa at the front of the knee. It is marked by swelling at the knee, which can be tender to the touch but which does not restrict the knee's range of motion. It is most commonly caused by trauma to the knee, either by a single acute instance or by chronic trauma over time. As such, prepatellar bursitis commonly occurs among individuals whose professions require frequent kneeling.
A definitive diagnosis of the condition can usually be made once a clinical history and physical examination have been obtained, though determining whether or not the bursitis is septic is not as straightforward. Treatment of prepatellar bursitis depends on the severity of the symptoms. Mild cases may only require rest and icing of the knee. A number of different treatment options have been used for severe septic cases, including intravenous antibiotics, surgical irrigation of the bursa, and bursectomy.
== Signs and symptoms ==
The primary symptom of prepatellar bursitis is the swelling of the area around the kneecap. It generally does not produce a significant amount of pain unless pressure is applied directly to the swelling. The area of swelling may be red (erythema), warm to the touch, or surrounded by cellulitis, particularly if the area has become infected. In such cases, the bursitis is often accompanied by fever.〔 Unlike arthritis, prepatellar bursitis generally does not affect the range of motion of the knee, though it may cause some discomfort when the knee is completely flexed. Flexion and extension of the knee may cause crepitus.
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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