Anatom3DMedial subtendinous bursa of gastrocnemius muscle
Bursa subtendinea medialis musculi gastrocnemii · Vnitřní podšlachová burza lýtkového svalu
Joints & cartilage
Looks like
A sac between the inner head of the calf muscle and the back of the knee, often connecting with the joint and the semimembranosus bursa.
What it does
Reduces friction behind the knee.
Keeping it well
Swells into a Baker's cyst when the knee makes extra fluid. A burst cyst mimics a blood clot; calf swelling needs a scan.
Related conditions
- ACL & meniscus injury
- Baker's (popliteal) cyst
- Chronic venous insufficiency
- Gout
- Growing pains
- Haemophilia & bleeding disorders
- Juvenile idiopathic arthritis
- Lyme disease
- Lymphatic filariasis (elephantiasis)
- Lymphoedema
- Marfan syndrome & connective tissue disorders
- Osteoarthritis
- Pseudogout (calcium pyrophosphate disease)
- Psoriatic arthritis
- Reactive arthritis
- Restless legs syndrome
- Rheumatic fever & rheumatic heart disease
- Rheumatoid arthritis
- Septic arthritis
- Systemic lupus erythematosus
- Temporomandibular joint disorder
- Varicose veins