M71.3: Other bursal cyst
Other bursal cyst, denoted by the ICD-10 code M71.3, is a medical condition characterized by the formation of a fluid-filled sac, or cyst, in a bursa other than the ones near the major joints. A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving body parts, like muscles, tendons or skin. While bursal cysts can occur in any bursa in the body, when categorized as an "other bursal cyst", it typically refers to cysts that are not in the usual locations, such as the knee (Baker's cyst) or elbow (olecranon bursitis). The symptoms of this condition may include pain, swelling, and restriction in movement in the affected area. Factors like overuse, trauma, infection, or certain medical conditions can contribute to the development of a bursal cyst. As the cyst enlarges, it may compress surrounding structures, making disease progression potentially detrimental to mobility and physical function.
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