adventitious bursa
anatomy
Also known as: accidental bursa
Quick Summary
An adventitious bursa is a small sac that forms in soft tissues due to repeated friction or stress, particularly over bony areas. Unlike permanent bursas, adventitious ones are not always present but can develop in response to chronic rubbing, such as on the foot. A bunion is an example of an adventitious bursa that forms on the big toe due to conditions like hallux valgus, often exacerbated by tight footwear. Inflammation of any bursa, including adventitious ones, is called bursitis and can cause pain and swelling.12
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