Abstract
The prepatellar bursa lies between the subcutaneous tissues and the patella. This bursa is held in place by the patellar ligament. The prepatellar bursa may exist as a single bursal sac or, in some patients, as a multisegmented series of loculated sacs. The prepatellar bursa is vulnerable to injury from both acute trauma and repeated microtrauma. Acute injuries are caused by direct trauma to the bursa during falls onto the knee or patellar fracture. Overuse injuries may be caused by running on soft or uneven surfaces or jobs that require crawling or kneeling, such as carpet laying or scrubbing floors, hence the other name for prepatellar bursitis: housemaid’s knee. If inflammation of the prepatellar bursa becomes chronic, calcification may occur.
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