Assistant
Definition
By Gregory R. Waryasz, MD
The subcutaneous prepatellar bursa of the musculoskeletal system is characterized by its location.
It is part of the knee joint. It consists of a synovial fluid surrounded by a synovial membrane.
Its unique structural feature is that it is between the skin and the tibial tuberosity.
The subcutaneous infrapatellar 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. It helps support and cushion the action of kneeling.
Common diseases include bursitis. Bursitis is inflammation of the bursa.
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.