Anatom3DSemimembranosus bursa
Bursa musculi semimembranosi · Burza poloblanitého svalu
Joints & cartilage
Looks like
A sac between the semimembranosus tendon and the inner head of the calf muscle and the tibia, behind the inner knee.
What it does
Lets the tendon glide at the back of the knee.
Keeping it well
Part of the Baker's cyst in many people; a lump behind the knee is usually harmless but a painful swollen calf needs checking.
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