Assistant
Definition
By Gregory R. Waryasz, MD
The subtendinous bursa of the musculoskeletal system is characterized by its location.
It is part of the elbow joint. It consists of a synovial fluid surrounded by a synovial membrane.
Its unique structural feature is that it is located in between the triceps tendon and the olecranon. The bursa is located proximal to the insertion of the tendon into the olecranon.
The subtendinous olecranon bursa as well as all other bones, muscles, and ligaments of the body are derived of mesodermal origin in the embryo.
The function of the bursa is to provide a cushion between bones, tendons, and muscles. This helps to reduce friction and allow free movement of structures.
Common diseases include bursitis. Bursitis is inflammation of the bursa. It results from friction between the triceps tendon and the olecranon. The pain is worst with forearm flexion.
Commonly used diagnostic procedures include clinical history, physical exam, and MRI.
It is usually treated with physical therapy and NSAIDs.
References
Elstrom J, Virkus W, Pankovich (eds), Handbook of Fractures (3rd edition), McGraw Hill, New York, NY, 2006.
Koval K, Zuckerman J (eds), Handbook of Fractures (3rd edition), Lippincott Williams & Wilkins, Philadelphia, PA, 2006.
Lieberman J (ed), AAOS Comprehensive Orthopaedic Review, American Academy of Orthopaedic Surgeons, 2008.
Moore K, Dalley A (eds), Clinically Oriented Anatomy (5th edition), Lippincott Williams & Wilkins, Philadelphia, PA, 2006.