Bursa, Aseptic Bursitis, Septic Bursitis, Calcific Bursitis
A bursa is a closed fluid-filled sac that functions to provide a gliding surface to reduce friction between tissues of the body, especially between muscles when they are in motion. When the bursa becomes inflamed, the condition is known as bursitis. Bursa is the Greek word for “a wine skin.” Plural is bursae. If the cause is infection, it is called septic bursitis. Absent the infection and it is called aseptic bursitis. Chronic (repeated of long-standing) inflammation of the bursa (bursitis) can lead to calcification of the bursa. This is referred to as calcific bursitis. The calcium deposition (calcification) can occur as long as the inflammation is present.